What should you know about how to use iontophoresis?

Iontophoresis uses a device, electrodes, and water to deliver a controlled current across a selected area. It is commonly used for troublesome sweating of the hands or feet. The aim is to reduce sweat output for a period, so maintenance sessions may be needed. A home device is not interchangeable with every professional system, and instructions differ between models.

Inspect the cables and electrodes, remove jewellery, and check that the skin has no open wound or active irritation. Fill the trays only to the marked level and position the hands or feet as shown in the manual. Begin at the lowest comfortable setting and follow the prescribed schedule; do not share the device or add products to the water unless told to do so. Moisturiser may help dry skin afterward, but avoid treating through numbness or reduced sensation. See [Iontophoresis Device](/technology/iontophoresis-device/) for equipment context.

Stop immediately for a shock-like sensation, intense pain, burning, blistering, or marked swelling. Seek medical advice if irritation does not settle, sweating suddenly changes, or treatment no longer seems appropriate. Urgent care is needed for fainting, chest symptoms, breathing difficulty, or a serious electrical injury.

Ask whether your sweating pattern is suitable for iontophoresis, which areas and schedule to use, how to adapt treatment for sensitive skin, and whether any medicine or implanted device changes the plan. Discuss [Excessive Sweating](/symptoms/excessive-sweating/) and alternatives such as [Botox For Sweating](/treatments/injectables/botulinum-toxin-for-hyperhidrosis/).