How effective is iontophoresis for hyperhidrosis?

During treatment, the hands or feet sit in shallow trays of water while a mild electrical current passes through the water. The current temporarily reduces sweat-gland activity in the treated skin. It is a local treatment, so it does not address sweating from areas that are not placed in the trays. The effect gradually wears off when treatment stops, which is why a maintenance routine matters.

Use the device exactly as instructed and keep the skin intact during treatment. Do not place jewellery in the trays, and tell the clinician about implanted electrical devices, pregnancy, reduced sensation, or skin conditions affecting the treatment area before starting. Mild tingling, dryness, or irritation can occur; report discomfort rather than increasing the current yourself. A clinician can help choose a schedule, assess progress, and consider alternatives if sweating remains disruptive.

Stop a session and seek advice if you develop marked pain, a burn-like area, persistent numbness, blistering, or significant swelling. Arrange medical review when sweating starts suddenly, occurs mainly during sleep, or comes with fever, dizziness, palpitations, weight change, or a new medicine, because another health issue may need checking. Persistent symptoms despite careful use also deserve a treatment review.

Which body areas can we treat? How should I adjust the schedule if my skin becomes dry? When should we judge the response? What options are available if iontophoresis is not enough?