When is prescription antiperspirant recommended for underarm sweating?

Underarm sweating is called axillary hyperhidrosis when sweat production is greater than the body needs for cooling. A prescription antiperspirant reduces sweat reaching the skin surface by acting on sweat ducts. It may be used for sweating that is present without heat or exercise, occurs on both sides, and interferes with work, social activities, sleep, or skin comfort.

A clinician may first ask when the sweating began, whether other body areas are involved, and whether medicines, illness, anxiety, or hormonal changes could be contributing. Possible local effects include stinging, dryness, redness, or irritation, especially when applied to damp or recently shaved skin.

Use the product exactly as prescribed. Many formulations are applied to completely dry underarm skin at a particular time, then washed off as directed; the schedule differs between products. Avoid applying it to broken, inflamed, or freshly shaved skin unless the prescriber says it is suitable. Tell the clinician if irritation persists, and keep a short record of sweating triggers and treatment response.

Arrange an assessment if sweating begins suddenly, occurs mainly during sleep, affects one side, or comes with fever, weight change, chest symptoms, dizziness, or a new medicine. Stop and seek advice for severe burning, swelling, blistering, or a widespread rash after application.

Ask whether your pattern suggests primary or secondary sweating, how to apply the product without irritating skin, what to do after a missed application, and which alternatives are available if control is incomplete.