What does iontophoresis treat?

During treatment, the hands or feet rest in shallow trays of water while a device delivers a controlled current. The current can temporarily reduce sweat output from the treated area. Iontophoresis is most often considered for palmar hyperhidrosis and plantar hyperhidrosis, and it may be useful when sweating interferes with writing, work, footwear, or daily routines. It does not correct every cause of sweating and does not treat sweating throughout the body in the same way.

A clinician should check the diagnosis and review medicines, skin breaks, implanted electrical devices, and pregnancy before treatment. Sessions require clean water and intact skin; small cuts can sting, so protect or report them before using a device. Follow the prescribed schedule and device instructions rather than increasing the current yourself. Learn more about [Iontophoresis](/treatments/laser-and-energy/iontophoresis/), an [Iontophoresis Device](/technology/iontophoresis-device/), and [Excessive Sweating](/symptoms/excessive-sweating/).

Stop a session and seek advice if there is persistent burning, blistering, marked redness, numbness, or a shock-like sensation. Arrange medical assessment if sweating begins suddenly, occurs with dizziness or chest symptoms, happens mainly during sleep, or is accompanied by weight change, fever, or a new medicine. These patterns may need evaluation beyond local treatment.

Ask whether your sweating is primary or linked to another condition, which areas can be treated, how to protect sensitive skin, and how maintenance sessions will fit your routine. Discuss alternatives such as [Botox For Sweating](/treatments/injectables/botulinum-toxin-for-hyperhidrosis/) if trays are impractical.