What should you know about iontophoresis skin treatment?

During a session, the hands or feet sit in shallow trays of water while the device delivers a controlled current. For underarm treatment, compatible pads or accessories may be used. The current is not intended to heat the skin; its effect is local and temporary, so maintenance sessions may be needed. Tingling or mild prickling can occur, and the skin may feel dry afterwards. This treatment addresses sweating rather than the underlying reason for it. Read more about [Excessive Sweating](/symptoms/excessive-sweating/) and the [Iontophoresis Device](/technology/iontophoresis-device/).

Use the schedule and intensity recommended for your device or clinician. Skin should be intact and free from cuts, active rash, or freshly applied irritating products. Remove metal jewellery before treatment and keep the current within the device instructions. Do not improvise with household electrical equipment. Moisturiser can help with dryness after a session, unless your clinician advises a different product. A clinician can explain whether [Iontophoresis](/treatments/laser-and-energy/iontophoresis/) suits your sweating pattern and whether [Botox For Sweating](/treatments/injectables/botulinum-toxin-for-hyperhidrosis/) is an alternative.

Stop a session if you develop marked burning, blistering, severe pain, swelling, or a persistent skin reaction. Seek medical advice for new sweating that is sudden, widespread, occurs during sleep, or comes with fever, chest symptoms, weakness, or unexplained weight change. A clinician should also review treatment before use if you have an implanted electrical device, reduced sensation, or a condition affecting the treated skin.

Which body areas should be treated, and how often should maintenance sessions occur? What intensity and water setup are appropriate for my skin? How should I protect irritated areas, and which symptoms mean I should stop?