Excessive sweating (hyperhidrosis) – tap-water iontophoresis at home
Hyperhidrosis is sweating well above what is needed, often to a disturbing degree, most commonly affecting the palms, soles and armpits. It is not caused by poor hygiene, and it is not something you can simply "stop" by willpower — it is a real, treatable condition that worsens quality of life for many. One of the most widespread, reliable home methods is tap-water iontophoresis: with a weak direct current and hands or feet submerged in water, or with an armpit electrode, sweating can be reduced.
What to know in advance
Iontophoresis is one of the first-line, home-appropriate treatments for excessive sweating. It has two phases: an initial, more intensive start-up phase until sweating is noticeably reduced, then a less frequent maintenance phase to preserve the effect. Important: the effect is not permanently lasting on its own — treatments must be repeated to maintain benefit. Below I explain how it works and what to watch for.
DermaDry Total home-use tap water iontophoresis device to support treatment of palmar, plantar and axillary hyperhidrosis. CE and FDA certified.
IontoBravo iontophoresis device for dual use: tap water iontophoresis (for hyperhidrosis) and traditional medicated iontophoresis (for joint pain). DC/PC mode.
How does tap-water iontophoresis work?
The method is simple: you place the treated body part (hand, foot) into a basin filled with water, or you apply a moist electrode to the armpit, and the device passes a weak direct current through the water. The current temporarily reduces sweat gland activity in the treated area, so sweating decreases. The treatment is painless for most people – at most it causes a slight tingling sensation.
The treatment has two phases
1. Start-up (intensive) phase: more frequent treatments in the first weeks (typically several times a week) until sweating is meaningfully reduced. 2. Maintenance phase: once the result is achieved, less frequent treatments (for example once a week or less) preserve the effect. Set the exact rhythm according to the device instructions and your own response – it varies between people.
Which device is right for you?
The devices in our range operate on the principle of tap-water iontophoresis and treat sweating of the palms, soles and armpits. When choosing, the main question is whether you need the device for other purposes as well.
In that case, a device designed specifically for hyperhidrosis is the most straightforward option: the package typically includes basins for hand and foot treatments and armpit electrodes, so all three common areas are treatable. These devices offer a simple, single-purpose solution.
There are dual-purpose devices that, besides tap-water iontophoresis for sweating, can perform traditional iontophoresis to deliver anti-inflammatory drugs into the skin — useful for joint pain, for example. If you have both sweating and such pain, a multifunction device can be more economical because it serves two purposes with one instrument.
When NOT to use it, and what to watch for
Tap-water iontophoresis is not suitable if you have a pacemaker or another implanted electrical device, a metal implant in the treated area, during pregnancy, or on damaged or broken skin. If you have epilepsy, consult your doctor first. The effect does not remain permanently: if you stop maintenance treatments, sweating may gradually return. If heavy sweating starts suddenly, is accompanied by night sweats, fever or weight loss, or if you are unsure about the cause, see a doctor – sudden-onset, generalized sweating can have other causes. Follow the device instructions for treatment, and ask for professional advice if in doubt.
Frequently asked questions
Yes, tap-water iontophoresis is one of the most long-standing, well-established home methods for hyperhidrosis of the palms, soles and armpits. Most people who treat regularly see a meaningful improvement. It is important, however, that maintenance treatments are required to preserve the effect – it is not a one-off cure.
For most people, the regular start-up phase brings a noticeable reduction in sweating within a few weeks. After that you can switch to a maintenance rhythm. Exact timing varies – some respond faster, others slower. Consistency in the initial weeks is key.
It is usually not painful – most people feel a mild tingling. The current intensity is adjustable, so you can set it to a comfortable level. If you feel stinging or discomfort, reduce the intensity. Mild dryness or redness of the treated skin can occur; this is generally minor and temporary.
Because iontophoresis temporarily reduces sweat gland activity; it does not eliminate it permanently. As gland function gradually recovers, sweating can return – maintenance treatments are needed to preserve the achieved result. This is inherent to the method, and for most users it can be incorporated into a weekly routine.
Do not use it if you have a pacemaker or another implanted electrical device, a metal implant in the treated area, during pregnancy, or on damaged or broken skin. People with epilepsy should obtain medical advice first. If you are unsure whether it is safe for you, ask your treating physician before starting treatment.
Summary – Quick overview
