What should you know about extreme hyperhidrosis?

Sweating may affect the palms, soles, underarms, face, scalp, or several regions. Primary hyperhidrosis often follows a repeated pattern and may run in families; secondary sweating can accompany illness, hormonal changes, or medicines and may involve the whole body or occur during sleep. Persistent moisture can soften skin and encourage irritation, heat rash, intertrigo, or fungal colour changes such as tinea versicolor. Notice when sweating began, which areas are involved, and whether it happens during sleep.

Use breathable clothing, change damp garments, dry skin folds carefully, and apply an appropriate antiperspirant as directed. A clinician can review medicines and possible causes, then discuss [Prescription Antiperspirant](/treatments/medical-dermatology/prescription-antiperspirant/). Other options include [Iontophoresis](/treatments/laser-and-energy/iontophoresis/), [Botox For Sweating](/treatments/injectables/botulinum-toxin-for-hyperhidrosis/), or [Microwave Sweat Gland Treatment](/treatments/laser-and-energy/microwave-sweat-gland-treatment/), depending on the site, skin condition, and goals.

Seek urgent help for sudden heavy sweating with chest pain, shortness of breath, fainting, confusion, severe weakness, or signs of heat illness. Arrange a medical review for new sweating at night, unexplained weight change, fever, palpitations, or a recent medicine change. Routine care is appropriate when sweating repeatedly damages skin or interrupts work, sleep, or daily tasks.

Is this primary or secondary hyperhidrosis? Could a medicine or health condition be contributing? Which areas should treatment target first? How can I protect moist skin folds? What side effects should I watch for with each option?