When is iontophoresis recommended for sweaty palms?

During iontophoresis, the palms are placed in shallow trays of water while a device delivers a mild electrical current. The current is intended to reduce sweat output in the treated area. A course usually involves repeated sessions, followed by maintenance sessions when sweating returns. The hands should be checked for cuts, irritation, eczema, or other skin problems before treatment. A clinician can also help distinguish palmar hyperhidrosis from sweating that began suddenly or affects the whole body.

Arrange an assessment if damp hands make writing, handling objects, work, or social contact difficult. Tell the clinician about medicines, implanted electronic devices, pregnancy, metal implants, reduced sensation, and any skin condition on the hands. Follow the device instructions closely, protect irritated skin, and stop if the current causes marked pain or a burn-like reaction. Do not increase the setting to make a session shorter. Keeping a brief record of triggers and treatment response can help guide maintenance.

Seek prompt medical advice for sweating that starts abruptly, occurs during sleep, affects much of the body, or comes with fever, dizziness, chest symptoms, weight change, or palpitations. Contact the treating clinician for persistent redness, blistering, numbness, worsening pain, or a skin infection after a session. These features need assessment rather than simply continuing treatment.

Ask whether the pattern fits palmar hyperhidrosis, how often initial sessions are needed, what maintenance may involve, and which alternatives suit your skin and medical history.