Iontophoresis is a non-invasive dermatological procedure that uses a mild electrical current to reduce excessive sweating in targeted areas such as the hands, feet, or underarms. It is considered a safe and effective treatment option for managing hyperhidrosis, when topical treatments are insufficient.
Dermatologists may recommend iontophoresis for patients with:
Excessive sweating of the palms.
Sweaty soles of the feet.
Reduces sweating in the specific area being treated.
Localised application means fewer risks compared to oral therapies.
No injections or surgical incisions are needed.
Suitable for repeated use with a maintenance schedule as advised by your dermatologist.
This is the standard approach for hyperhidrosis. Patients place their hands or feet in shallow trays of tap water while a low electrical current is passed through the skin.
Some medical iontophoresis systems allow the use of either a steady direct current or a pulsed current mode. Pulsed current may offer added comfort for sensitive areas or for individuals undergoing treatment for the first time.
Before starting treatment, your dermatologist will:
The treatment area is cleaned and dried. Skin needs to be checked. Any wounds or cuts may cause stinging sensation during treatment.
Electrodes are placed into trays of tap water for hands and feet.
A gradual increase of electrical current is applied for 20–30 minutes. You may feel a light tingling. Clinic assistant will check on your comfort level before increasing the current.
The current is gradually reduced and the treatment area will be dried.
Immediate Care: You may notice slight redness or tingling, which usually fades within a few hours. Avoid activities that make you sweat excessively, such as intense exercise or swimming, for the rest of the day.
Expected results: Many people see noticeable improvements after 4 sessions. Your dermatologist will recommend a suitable maintenance schedule after that.
Follow-Up: Attend your scheduled appointments to monitor progress and make any needed adjustments to the treatment plan. If the treatment is effective, you can purchase an approved iontophoresis so that you can self-treat at home at your convenience.
Iontophoresis is generally a safe and well-tolerated procedure. Mild side effects such as skin irritation, temporary redness, tingling, or dryness may occur. In rare cases, small blisters or discomfort can develop. To ensure safe and effective treatment, iontophoresis should be performed and taught only by a trained nurse or assistant, who can tailor the settings and monitor your response based on your individual skin condition.
Yes, the treatment is non-sedating and does not impair alertness.
Most patients require multiple sessions over 2–4 weeks. Your dermatologist will recommend a schedule based on your response.
Yes, iontophoresis works on the soles of the feet. Treatment settings may be adjusted to account for skin thickness.
Dr. Liew Hui Min is an accredited consultant dermatologist from the Ministry of Health and the General Medical Council UK.
Her clinical interest includes:
Having trained in major London Hospitals, Dr Liew returned to Singapore in 2014 as a Consultant at KK Women’s and Children’s Hospital (KKH) where she specialised in paediatric, women, obstetric and vulva dermatology. Currently, Dr Liew practices at The Skin Drs. clinic located at Gleneagles Hospital.
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