FAQs: Hyperhidrosis & Iontophoresis Treatment

    Answers to common questions about iontophoresis and hyperhidrosis

    We have sum­ma­rized the answers to the most fre­quent­ly asked ques­tions about ion­tophore­sis and hyper­hidro­sis here.

    For more com­plex or indi­vid­ual ques­tions about your ther­a­py, you can con­tact our ion­tophore­sis experts via What­sAPP at +492056981110 or by call­ing +49 (0) 2056/98 11 0.

    Health questions about hyperhidrosis and iontophoresis treatment

    What is hyperhidrosis?

    The term hyper­hidro­sis refers to exces­sive sweat­ing that goes beyond the body’s need for ther­mal reg­u­la­tion. Peo­ple with hyper­hidro­sis sweat exces­sive­ly, regard­less of phys­i­cal exer­tion or ambi­ent tem­per­a­ture. This dys­func­tion can lead to sig­nif­i­cant men­tal, social, and occu­pa­tion­al lim­i­ta­tions and can thus cause a marked reduc­tion in the qual­i­ty of life.

    Hyper­hidro­sis can occur in dif­fer­ent parts of the body. Hyper­hidro­sis often occurs on the hands (hyper­hidro­sis pal­maris), on the face (hyper­hidro­sis facialis), on the soles of the feet (hyper­hidro­sis plan­taris), and in the armpits (hyper­hidro­sis axil­laris). There are two types of hyper­hidro­sis Pri­ma­ry or focal hyper­hidro­sis occurs inde­pen­dent­ly of oth­er dis­eases. Sec­ondary hyper­hidro­sis occurs as a result of an exist­ing, under­ly­ing con­di­tion or as a side effect of tak­ing med­ica­tion or dietary sup­ple­ments.

    When should I NOT do tap water iontophoresis?

    Treat­ment with ion­tophore­sis devices must nev­er be used in patients:

    • with pace­mak­ers
    • with defib­ril­la­tor implants
    • who are preg­nant
    • who have an IUD con­tain­ing met­al (no treat­ment of the feet)
    • with met­al implants near the region where the cur­rent is to be applied
    • with major skin defects/wounds that can­not be cov­ered with Vase­line
    • with areas of skin near the treat­ment area with lim­it­ed or no sen­si­tiv­i­ty (e.g. polyneu­ropa­thy)
    • with major wounds, rash­es, swelling, local­ized inflam­ma­tions, or acute local infec­tions
    • diag­nosed or sus­pect­ed heart issues or epilep­sy

    Do NOT apply the elec­tric cur­rent direct­ly to the chest, the brain, or the sinus cav­i­ties!

    I have an IUD. Can I have an TWI treatment?

    If your IUD is not com­plete­ly encased in plas­tic, then you should NOT let your feet be treat­ed. If the IUD is com­plete­ly encased in plas­tic, sil­i­cone, or sim­i­lar mate­r­i­al, then the met­al is insu­lat­ed and treat­ment may be per­formed.

    I am pregnant. Can I have an TWI treatment?

    Do NOT get treat­ed with TWI if you are preg­nant. No stud­ies or empir­i­cal data on TWI treat­ment with HIDREX devices dur­ing preg­nan­cy are avail­able. We there­fore strong­ly advise against being treat­ed while preg­nant.

    I am nursing my baby. Can I have an TWI treatment?

    Yes. How­ev­er, the baby should not be on the chest or have skin con­tact with the moth­er dur­ing the treat­ment.

    I have metal implants. Can I have an TWI treatment?

    Basi­cal­ly, all met­al implants are an absolute con­traindi­ca­tion. If the implants are in the direct range of the cur­rent flow, no treat­ment should be per­formed. If the implant is not in the direct range of the cur­rent flow, it is a rel­a­tive con­traindi­ca­tion. The risk of its caus­ing prob­lems is rather low, but please con­sult with your physi­cian before accept­ing treat­ment.

    I have pain in some parts of my skin during treatment. Can I do something about it?

    Small skin defects, such as scratch­es or cracks should be cov­ered thick­ly with Vase­line. The water lev­el should avoid the nail bed as fre­quent micro injuries here can lead to pain dur­ing treat­ment.

    What are the typical signs of primary, focal hyperhidrosis?

    • onset of symp­toms in child­hood, ado­les­cence, or ear­ly adult­hood (usu­al­ly by age 25; with hand symp­toms usu­al­ly occur­ring before puber­ty)
    • sweat­ing regard­less of tem­per­a­ture, unpre­dictable, and not will­ing­ly con­trol­lable
    • local­ized occur­rence in one or more sites prone to a dis­ease with bilat­er­al, sym­met­ric involve­ment
    • occurs more than once a week and impairs the qual­i­ty of every­day life
    • no increased sweat­ing dur­ing sleep
    • pos­i­tive fam­i­ly his­to­ry

    How does my doctor diagnose hyperhidrosis?

    The diag­no­sis of pri­ma­ry, focal hyper­hidro­sis is made main­ly by inter­view­ing the patient and phys­i­cal evi­dence of sweat pro­duc­tion. In addi­tion, the iodine-starch test and a quan­ti­ta­tive mea­sure­ment of sweat lev­els can be per­formed.

    I have to wear a long-term ECG. Can I have an TWI treatment?

    A long-term ECG exam­i­na­tion is not an absolute con­traindi­ca­tion for TWI. Nev­er­the­less, we do not rec­om­mend con­comi­tant treat­ment. Dur­ing the usu­al­ly 24-hour ECG record­ing, the TWI ther­a­py can be paused with­out neg­a­tive impact on your ther­a­py.

    My skin is very dry following the treatment. But why is this the case?

    Dur­ing the treat­ment a reversible chang­ing of the acid-base bal­ance of the skin occurs by means of ion trans­port. This results in the pos­i­tive and desired effect of the skin being dry and reduc­ing excess sweat­ing.

    Our top tip: Apply cream to your skin fol­low­ing treat­ment (nev­er before ther­a­py!) The skin should be degreased pri­or to treat­ment. Pri­or to treat­ment thor­ough­ly wash the area to be treat­ed in order to remove any resid­ual cream.

    Technical questions about Hidrex iontophoresis devices

    Are HIDREX devices safe and tested?

    We are autho­rized to man­u­fac­ture med­ical devices in accor­dance with EU Direc­tive 93/42/EEC and are there­fore autho­rized to issue the med­ical CE mark for our med­ical devices.

    In addi­tion, our TWI devices have been reg­is­tered by the US Food and Drug Admin­is­tra­tion. For your safe­ty we main­tain a super­vised qual­i­ty man­age­ment sys­tem for med­ical devices and are cer­ti­fied accord­ing to EN ISO 13485:2016.

    What are the components of an iontophoresis device?

    Each ion­tophore­sis device con­sists of 4 device com­po­nents:

    • Con­troller (e.g. HIDREX con­nectION)
    • Spe­cial acces­sories for the areas of the body to be treat­ed (e.g. ergonom­ic treat­ment basins for hands and feet, axil­lary appli­ca­tors, face masks)
    • Treat­ment elec­trodes (to trans­fer the elec­tric­i­ty to the water)
    • Con­nec­tion dou­ble cable (for the trans­mis­sion of the cur­rent from the con­trol unit to the treat­ment elec­trodes)

    Why is the operation of the device with a plug-in power adapter harmless, although other devices are operated with batteries or rechargeable batteries?

    Tech­ni­cal­ly, you have to imag­ine that the treat­ment cir­cuit is com­plete­ly dis­con­nect­ed from the pow­er sup­ply and thus (even in case of a seri­ous fault) has NO con­nec­tion.

    This is called a “gal­van­ic sep­a­ra­tion”.

    This absolute­ly impor­tant tech­ni­cal secu­ri­ty is already ensured direct­ly in the pow­er adapter, so that the mains volt­age can­not reach the device at all.

    For this rea­son, only the sup­plied orig­i­nal med­ical pow­er adapter may be used.

    My power adapter is defective. Can I buy a replacement one at the hardware store or electronics store?

    No, it is essen­tial to use only the orig­i­nal pow­er adapter with med­ical approval. The pow­er adapter is a deci­sive fac­tor for the over­all safe­ty of the ther­a­py device and has to be approved for med­ical devices in addi­tion to the spe­cial tech­ni­cal require­ments.

    Such pow­er adap­tors are usu­al­ly not avail­able in retail stores. Only when using the orig­i­nal pow­er adapter can the safe­ty be ensured (see above).

    Con­sid­er the pow­er adapter as part of the ther­a­py device and not just as anoth­er acces­so­ry.

    My therapy device is not working. Why would that be?

    In about 90% of cas­es, the cause is a wrong set­up. Please note that both treat­ment elec­trodes can­not be in the same basin.

    Turn on the device first, then place your hands or feet in the treat­ment tubs. Clamp the AX set to the armpits only after switch­ing it on.

    For fur­ther trou­bleshoot­ing, please first use the fol­low­ing check­list before return­ing the device for repair. You may save your­self and us time, effort, and costs.

    • Ver­i­fy that the safe­ty pow­er adapter is prop­er­ly con­nect­ed to the base unit and to your elec­tri­cal out­let.
    • Check that the con­nec­tors of the con­nect­ing dou­ble cables have been pushed far enough onto the con­nec­tions of the treat­ment elec­trodes for a secure con­tact.
    • Check if the device is work­ing prop­er­ly with anoth­er per­son; it may be that the over ther­a­py pro­tec­tion func­tion has been acti­vat­ed.

    Tip:     In rare cas­es, the tap water used may not have a suf­fi­cient con­duc­tiv­i­ty (e.g. when the tap water has been deionised). In these cas­es, try using bot­tled water (with­out car­bon­a­tion).

    Also note the instruc­tions for the care of the ion­tophore­sis device. Lime deposits on the elec­trodes can hin­der the flow of the cur­rent.

    Please con­tact us if you have any ques­tions. Thank you!

    Why should I choose a HIDREX device?

    Our HIDREX devices have been proven to have a 98% suc­cess rate. For more than 35 years, we have devel­oped high­ly effec­tive, first-class ther­a­py sys­tems in col­lab­o­ra­tion with doc­tors, uni­ver­si­ty hos­pi­tals, and ther­a­pists.

    We con­sis­tent­ly focus on the use of the lat­est tech­nolo­gies and high-qual­i­­ty com­po­nents to devel­op and man­u­fac­ture cer­ti­fied med­ical devices for inno­v­a­tive, nat­ur­al heal­ing process­es. Using both DC and pulse cur­rent makes our devices high­ly flex­i­ble and effec­tive.

    Thanks to adjustable pulse range, our devices com­bine the best advan­tages of both types of cur­rent. High volt­ages make speedy ther­a­py suc­cess pos­si­ble. Tech­ni­cal fea­tures, such as the ASE anti-shock elec­tron­ics fur­ther ensure safe­ty and com­fort.

    We are autho­rized to man­u­fac­ture med­ical devices in accor­dance with EU Direc­tive 93/42/EEC and are there­fore autho­rized to issue the med­ical CE mark for our med­ical devices. In addi­tion, our TWI devices have been reg­is­tered by the US Food and Drug Admin­is­tra­tion.

    For your safe­ty we main­tain a super­vised qual­i­ty man­age­ment sys­tem for med­ical devices and are cer­ti­fied accord­ing to EN ISO 13485:2016.

    The electrodes are showing discoloration. What can I do?

    It is nor­mal for the elec­trodes to dis­colour slight­ly after a few appli­ca­tions. The dis­col­oration has no influ­ence on the treat­ment results.
    The tex­ture of water has influ­ence on the dis­col­oration, so that dis­col­oration can vary depend­ing on the water sup­ply in the region.

    If you do not suf­fer from a nick­el or chromi­um aller­gy, we rec­om­mend using the stain­less steel elec­trodes as the risk of dis­col­oration of the elec­trodes is low­er and they are much faster and eas­i­er to clean.

    Please observe the care instruc­tions for the elec­trodes.

    My device is less effective than it once was. Is it broken?

    It is very rare that a device is bro­ken. In almost all cas­es, con­t­a­m­i­nat­ed elec­trodes are the cause; these can lead to reduced ther­a­peu­tic effec­tive­ness.

    Lime deposits on the elec­trodes can hin­der the flow of the cur­rent. These deposits can be removed with house­hold lime removers, vine­gar, or cit­ric acid.

    Please observe the instruc­tions for care of the elec­trodes.

    How do I properly care for my electrodes?

    After each treat­ment, rinse your met­al elec­trodes with clean water and care­ful­ly wipe the plates with a soft cloth to pre­vent limescale. Every 5 treat­ments or so, you should clean the elec­trodes with a damp cloth and com­mer­cial deter­gent or a sur­face dis­in­fec­tant.

    What can I do if my electrodes have deposits?

    Over time, cal­ci­um and min­er­al deposits can accu­mu­late on the elec­trodes. There­fore, every 3 to 6 months (depend­ing on the hard­ness of your tap water), you should place the elec­trodes overnight in a 50:50 solu­tion of water and vine­gar. The next day just wipe with a tow­el and then rinse off. You can also use com­mer­cial decal­ci­fiers.

    My device is not reaching the voltage level I set. Is it broken?

    It is very rare that a device is bro­ken. Occa­sion­al­ly, we receive feed­back from new cus­tomers that the volt­age is not get­ting as high as you have set it or that the volt­age drops slight­ly after set­ting.

    In this case, it is very like­ly that the cur­rent lim­it func­tion has been acti­vat­ed. This hap­pens when a per­son­’s elec­tri­cal resis­tance is very low due to heavy sweat­ing. Due to the eas­i­er flow of cur­rent, the max­i­mum treat­ment cur­rent can be reached before the set volt­age is reached. A pro­tec­tion cir­cuit (cur­rent lim­it) inter­venes in this case and pre­vents the volt­age from ris­ing too high to pro­tect you from burns. The ther­a­peu­tic effect is not affect­ed by this!

    Over time, you can slow­ly increase the volt­age val­ues as your sweat­ing lev­els decline (the elec­tri­cal resis­tance of the dry­ing skin increas­es, so that high­er cur­rent val­ues are nec­es­sary for the device to be effec­tive).

    How can I check the function of my HIDREX device?

    To check the func­tion of your HIDREX clas­si­cION or con­nec­tION, fol­low these steps:

    1. Set up the device as if you want­ed to start the treat­ment.
    2. Switch on the con­trol unit at the main switch. The dis­play should show treat­ment dose and dura­tion.
    3. Now close the ther­a­py cir­cuit by plac­ing one elec­trode on the tow­el of the sec­ond elec­trode with­out touch­ing the elec­trodes direct­ly. Now place both elec­trodes on top of each oth­er and sep­a­rat­ed by a tow­el in a basin filled with water. When using the AX elec­trodes, press the two sponge pads soaked in water direct­ly against each oth­er.
    4. The device should now dis­play the dose indi­ca­tion con­stant­ly and the volt­age should rise to set val­ue start­ing from 4V.

    If he treat­ment does not start with this set­up, even tak­ing the error check­list into account, please con­tact us in order to coor­di­nate the fur­ther pro­ce­dure.

    Do I have to download the MyHIDREXApp in order to operate the HIDREX connectION and HIDREX conceptION device models?

    No! All device mod­els can also be oper­at­ed with­out the app. The ther­a­py time, how­ev­er, is fixed and can only be used with the HIDREX con­nectION device via the app. You can­not access oth­er addi­tion­al func­tions such as, for exam­ple, cre­at­ing ther­a­py pro­to­cols with­out the app.

    What is anti schock electronics (ASE)?

    All HIDREX devices have a spe­cial inte­grat­ed fea­ture called anti-shock elec­tron­ics (ASE). This func­tion almost com­plete­ly pre­vents the occur­rence of light elec­tric shocks (pas­ture fence effect). For exam­ple, when inter­rupt­ing the cir­cuit, such as when remov­ing hands or feet from the treat­ment tubs dur­ing the cur­rent ther­a­py.

    The ASE ensures more safe­ty dur­ing your ther­a­py and makes han­dling eas­i­er. Even if the so-called pas­ture fence effect is harm­less, it can nev­er­the­less be unpleas­ant.

    It is impor­tant to note that ASE is only acti­vat­ed when the device is switched on. It is there­fore high­ly rec­om­mend­ed always to sep­a­rate the area to be treat­ed from the water source (remove hands or feet from the water or remove the pads and elec­trodes from the armpit or face) before turn­ing off the device.


    Questions about the purchase/rental of Hidrex iontophoresis devices for hyperhidrosis treatment

    Will my health insurance cover the costs for TWI therapy?

    The statu­to­ry and pri­vate health insur­ance com­pa­nies in Ger­many usu­al­ly cov­er the costs of a home ion­tophore­sis device for hyper­hidro­sis ther­a­py.

    Depend­ing on the pol­i­cy, this pro­vi­sion may cov­er a one-off pur­chase or a device rental (only for Ger­many). Before the insur­ers promis­es to pay, your treat­ing physi­cian will often have to pro­vide evi­dence that the ion­tophore­sis treat­ment is effec­tive.

    For this pur­pose, an ini­tial treat­ment round of about ten ses­sions will have to be per­formed before you can have your own device pre­scribed. This ini­tial ther­a­py is car­ried out at the doctor’s prac­tice or with a loan­er device at home (see below).

    If the insur­ance com­pa­ny approves a device rental, as is the case with such com­pa­nies as Tech­niker Krankenkasse, a fol­low-up pre­scrip­tion will be required after the three-month tri­al phase and then again every two years.

    I was recommended to rent an iontophoresis device from you. How does that work?

    First of all, it is impor­tant to know what your insur­er will cov­er.

    If you are cov­ered by statu­to­ry health insur­ance in Ger­many, then down­load the rental agree­ment from our home­page (only for Ger­many) and send it back to us filled in and signed . We will pro­vide you with a loan­er device for free for 5 weeks. Short­ly before the expiry of the 5 weeks, we will need a cor­re­spond­ing med­ical pre­scrip­tion from your doc­tor or you will send the device well packed and with suf­fi­cient­ly postage back to us.

    Are you insured with Tech­niker Krankenkasse? Then we need a med­ical pre­scrip­tion right from the begin­ning.

    If you are cov­ered by pri­vate health insur­ance in Ger­many, then down­load the rental agree­ment from our home­page (only for Ger­many) and send it back to us filled in and signed . We will pro­vide you with a loan­er for free for 5 weeks. In addi­tion, you will receive an offer to pur­chase from us which you can sub­mit to your health insur­ance. Short­ly before the expiry of the 5 weeks, you can send the cor­re­spond­ing pur­chase order approved by your insur­ance or you will send the device well packed and with suf­fi­cient­ly postage back to us.

    Does HIDREX offer me free help and support for any questions or concerns?

    Yes! If you have ques­tions or con­cerns with your TWI ther­a­py, please con­tact us.

    You can reach our cus­tomer ser­vice quick­ly via What­sApp at +49 (0) 2056 / 9811–10. You can also email us at . You can reach us by phone at +49 (0) 2056 / 9811–0.

    Will I have to buy replacement parts on a regular basis?

    For the treat­ment of the hands or feet, your treat­ment set will con­tain cot­ton tow­els to cov­er the elec­trodes. Over time, the tow­els will wear with time.

    You can replace them with HIDREX tow­els which are cut and sewn to fit in our trans­port and treat­ment case and in our ergonom­ic treat­ment basins.

    You can also use your own tow­el.

    We rec­om­mend a white cot­ton tow­el (no dyes) to cov­er the elec­trodes and to pre­vent your skin from direct­ly touch­ing the elec­trodes dur­ing treat­ment.

    For the treat­ment of the armpits or oth­er body parts, you will need spe­cial sponge pads which have to be replaced every 1–2 years.

    Can I borrow a TWI device from HIDREX?

    Yes. To test a device or to per­form the ini­tial phase at home, you can bor­row an ion­tophore­sis device for free for 5 weeks (only for Ger­many).

    Down­load, com­plete, and sign our rental agree­ment (only for Ger­many), then return it to us.

    Where can I buy a HIDREX device?

    HIDREX ion­tophore­sis devices can be ordered from any­where in the world. You can con­tact us direct­ly or also one of our long-stand­ing sales part­ners. Click here for an overview of our glob­al dis­trib­u­tors.

    Questions about treatment with tap water iontophoresis

    What is tap water iontophoresis (TWI) and how does it work?

    TWI ther­a­py uses tap water and a low-volt­age elec­tri­cal cur­rent to treat exces­sive sweat­ing on the feet, hands, etc.

    Com­pared to oth­er avail­able treat­ments, tap water ion­tophore­sis (TWI) is con­sid­ered to be the most effec­tive, safest, and most afford­able treat­ment for exces­sive sweat­ing of the hands, feet, armpits, or face.

    TWI is a treat­ment method that has been sci­en­tif­i­cal­ly rec­og­nized for many years and can result in nor­mal­ly dry skin in 98% of cas­es with­out med­ica­tion or surgery. Research, how­ev­er, has yet to iden­ti­fy exact­ly why it is so effec­tive. It is believed that the TWI dis­rupts the way stim­uli and secre­tion are cou­pled in the sweat glands.

    It caus­es a post­sy­nap­tic, but reversible func­tion­al dis­or­der, with the result that less or almost no sweat can escape from the sweat glands.

    What is the treatment procedure?

    Treat­ment with TWI is sim­i­lar to work­ing out: the qual­i­ty of the results depends on how dis­ci­plined you are at doing your exer­cis­es.

    The treat­ment is car­ried out by hand and foot baths or by treat­ment of the armpits, face, neck, or back with spe­cial sponge appli­ca­tors through which weak DC or vari­able pulse elec­tri­cal cur­rents are passed.

    The ther­a­py starts with the ini­tial phase, a dai­ly 15-minute treat­ment for 10 days, in which the sweat­ing is reduced to nor­mal lev­els. After­wards, 1–2 treat­ments a week are usu­al­ly suf­fi­cient to main­tain the results.

    The ther­a­peu­tic effect is reversible, so if treat­ments stop, the sweat­ing will resume after some time.

    How often should I perform the treatment?

    In the ini­tial phase, treat­ment should be done dai­ly or every oth­er day.

    Improve­ment should be seen after about 10 to 20 treat­ments. There are sig­nif­i­cant indi­vid­ual dif­fer­ences in the sub­se­quent main­te­nance phase.

    Some patients need to be treat­ed 3 times a week, oth­ers only 2 times a month. Patients will need to deter­mine this through tri­al and error.

    Do I have to do the therapy regularly?

    Yes! The tap water ion­tophore­sis caus­es a reversible dis­rup­tion to the func­tion of the sweat glands.

    The treat­ment inhibits the sweat glands and allows them to “ignore” the (exces­sive) ner­vous sig­nals from the brain which cause exces­sive sweat­ing.

    With­out fur­ther TWI treat­ments, the exces­sive sweat­ing will start again. Reg­u­lar main­te­nance treat­ments are need­ed to ensure con­tin­ued suc­cess­ful results.

    Is it possible to treat my hands and feet at the same time?

    Yes! The Duo Set togeth­er with the ergonom­ic basins makes it pos­si­ble to treat both your hands and feet in one ses­sion.

    How­ev­er, this is not always rec­om­mend­ed, but only if you are treat­ing the hands and feet with the same type of cur­rent and volt­age for the same dura­tion. The Duo Set does not allow dif­fer­ent treat­ment para­me­ters to be set for the hands and feet.

    I received an electric shock during treatment. What happened?

    That hap­pens every now and then, but very rarely com­pared to old­er mod­els or com­pet­i­tive devices! These are always com­plete­ly harm­less, but also some­times unpleas­ant volt­age spikes (or volt­age drops, which feels almost iden­ti­cal).

    If, for exam­ple, you keep your hands in the water when switch­ing on the device, you might get a slight shock. Short brownouts in the mains sup­ply as well as loose con­tacts in the pow­er adapter or the elec­trode con­nec­tion are fur­ther pos­si­ble caus­es for this effect.

    We rec­om­mend slow­ly tak­ing your hands or feet out of the treat­ment basins and not jerk­ing them out.

    I can feel the current on one side more than on the other. Is my device defective?

    No! The elec­tri­cal cir­cuit used for treat­ment has elec­tric­i­ty run­ning in two dif­fer­ent polar­i­ties: cath­ode (black cable, neg­a­tive­ly charged) and anode (red cable, pos­i­tive­ly charged).

    Although it has been sci­en­tif­i­cal­ly proven that the anode is some­what more effec­tive, there is no con­sis­tent cus­tomer feed­back on this top­ic.

    Some cus­tomers feel the pos­i­tive side more, oth­ers the neg­a­tive ones. This is nor­mal and okay.

    What is the difference between direct current (DC) and pulse current (PC)?

    Direct cur­rent (DC) has the strongest effect because its out­put is 100% with­out paus­es. How­ev­er, over­sen­si­tiv­i­ty to the cur­rent flow some­times means using DC at too low a dose or not at all on sen­si­tive skin areas.

    DC is still used to treat the feet. With pulse cur­rent (PC), the cur­rent flow jumps at equal­ly long inter­vals between ON (50% pulse) and OFF (50% pause).

    These inter­vals reduce the feel­ing of the cur­rent. How­ev­er, the paus­es make PC less effec­tive than DC.

    In the treat­ment of sen­si­tive skin areas, how­ev­er, the PC is def­i­nite­ly the bet­ter choice.

    Is DC or pulse current better?

    DC is sig­nif­i­cant­ly more effec­tive because the patient receives the full amount of elec­tric­i­ty at all times. The dis­ad­van­tage, how­ev­er, is that you can feel it at all times, too. Pulse cur­rent is hard­ly notice­able at cer­tain volt­ages, but usu­al­ly requires longer treat­ment times to be effec­tive.

    Also, high­er volt­ages are eas­i­er to endure, bet­ter enabling treat­ments to such sen­si­tive areas as under the armpits or the palms and the treat­ment of chil­dren.

    HIDREX’s pulse cur­rent com­bines the com­fort & effec­tive­ness and is only avail­able in the PSP 1000.

    What is variable pulse current (VPC)?

    VPC can be described as a mix­ture of DC and PC, which com­bines the best of both types of cur­rent. With VPC, it is pos­si­ble to extend the ON-phas­es com­pared to the OFF-phas­es with­in a cycle (e.g. 90% pulse, 10% break).

    The short­er pause times trans­mit much more ener­gy than the stan­dard pulse cur­rent. This abil­i­ty to adjust the pulse range increas­es the effec­tive­ness com­pared to the con­ven­tion­al pulse cur­rent AND the com­fort com­pared to DC cur­rent.

    VPC is thus the most effec­tive form of cur­rent and allows opti­mal con­sid­er­a­tion of the indi­vid­ual needs and sen­si­tiv­i­ties of patients.

    For the treat­ment of chil­dren and of sen­si­tive skin areas in adults, VPC is the best choice.

    Do I have to change the polarity (polarity) during the treatment?

    In prin­ci­ple, the effect of HIDREX ther­a­py does not depend on the polar­i­ty of the cur­rent.

    How­ev­er, clin­i­cal stud­ies have shown that the anode (pos­i­tive elec­trode, con­nec­tion A) is slight­ly more effec­tive at the begin­ning of the treat­ment series than the cath­ode (neg­a­tive elec­trode, Con­nec­tion B).

    Devices without automatic polarity switching

    When treat­ing the hands, we rec­om­mend not chang­ing the polar­i­ty until one side has reached the desired skin dry­ness. If one side is dry enough (e.g. the right hand) the polar­i­ty should be changed once for the fur­ther ses­sions until the sec­ond side (e.g. the left hand) has reached the desired effect. After­wards, the polar­i­ty should be swapped for each treat­ment ses­sion, as with the treat­ment of the feet or armpits in gen­er­al.

    The polar­i­ty can be swapped by sim­ply switch­ing the cath­ode (B) and anode (A).

    Devices with automatic polarity switching

    To ensure a con­sis­tent treat­ment out­come on both treat­ment sides from the begin­ning, you can auto­mat­i­cal­ly change the polar­i­ty of devices equipped with­in a sin­gle treat­ment ses­sion. This fea­ture can be enabled or dis­abled as need­ed. The advan­tage of this is that you won’t need to remem­ber which polar­i­ty you need to use for each ses­sion.

    Are there any studies on the efficacy of tap water iontophoresis?


    The effect of tap water ion­tophore­sis has been sci­en­tif­i­cal­ly proven for many years. For study results on the effi­ca­cy of tap water ion­tophore­sis using HIDREX devices, see here.

    Despite initial success, the sweating got worse again. What can I do?

    It is pos­si­ble that your body has become “used to” the flow of elec­tric­i­ty and the ther­a­py is cur­rent­ly not work­ing prop­er­ly. You can try to treat with high­er volt­age, to extend the pulsed-width or switch to DC. If that does not help, stop your ther­a­py for 2–3 weeks until the sweat­ing returns com­plete­ly. Then start your ther­a­py again as at the begin­ning of your TWI treat­ment.

    What is the benefit of the automatic polarity change halfway through the treatment time?

    Clin­i­cal stud­ies have shown that the anode (pos­i­tive elec­trode, con­nec­tion A) is slight­ly more effec­tive at the begin­ning of the treat­ment series than the cath­ode (neg­a­tive elec­trode, con­nec­tion B). Dur­ing the auto­mat­ic polar­i­ty change halfway through the treat­ment time a simul­ta­ne­ous treat­ment of both sides occurs from the out­set. The advan­tage of this is that you won’t need to remem­ber which polar­i­ty you need to use.

    When treating the face why should I not change the polarity?

    As the anode (pos­i­tive elec­trode, con­nec­tion A) is, in effect, much stronger than the cath­ode (neg­a­tive elec­trode, con­nec­tion B) it is more effec­tive for facial ther­a­py if it is only treat­ed with the anode. Dur­ing treat­ments, where both sides have to be treat­ed (hands, feet, armpits) the polar­i­ty should be switched reg­u­lar­ly for an even treat­ment result.


    During treatment with the face mask, should a hand or foot be treated as well? Does this negatively affect the treated hand/foot?

    Due to the low dose used to treat the face, no neg­a­tive effects are to be expect­ed on the hand or foot. In order to fur­ther reduce the effect of ther­a­py on the hand or foot, the hand or foot can be altered from ther­a­py ses­sion to ther­a­py ses­sion.



    I have a home filter system (e.g. descaling / carbon reducer). Does this affect the success of my therapy?

    Yes, the com­po­si­tion of the water has an effect on tap water ion­tophore­sis. In the con­text of tap water ion­tophore­sis ther­a­py, care should be tak­en that no deionised or dem­iner­alised water is used, as this has a very low elec­tri­cal con­duc­tiv­i­ty and the ther­a­peu­tic effect would be lost.

    If you use home fil­ter sys­tems, for exam­ple for decal­ci­fi­ca­tion, you should not use the tap water for your ther­a­py. Make sure you have a suf­fi­cient con­cen­tra­tion of cal­ci­um, mag­ne­sium and salts in the water. Infor­ma­tion about your water qual­i­ty can be obtained from your local water sup­ply com­pa­ny.

    Basi­cal­ly this means: Any nor­mal water is good and can be used for tap water ion­tophore­sis. If you have doubts about your water qual­i­ty, use sim­ple table water. You can also try to add some salt to the water to improve the treat­ment out­come.

    Can aluminium-containing antiperspirants be used in addition to tap water iontophoresis?

    No! Please do not use antiper­spi­rants or alu­mini­um-con­­tain­ing deodor­ants in the same areas that you are treat­ing with ion­tophore­sis as this may cause burns in the treat­ed area. The alu­mini­um par­ti­cles can dif­fuse into the human tis­sue as a result of the cur­rent trans­port process if the skin areas pre­vi­ous­ly treat­ed with alu­mini­um chlo­ride are treat­ed with LWI at the same time.