Excessive Sweating
Excessive sweating, or hyperhidrosis, means sweating far more than needed to regulate body temperature, often affecting the underarms, hands, feet or face
About excessive sweating
Primary hyperhidrosis has no identifiable underlying cause and usually starts in childhood or adolescence, affecting specific areas symmetrically. Secondary hyperhidrosis is caused by another condition or medicine and tends to be more general. It can significantly affect confidence and daily life even though it isn't dangerous
Treatments
Symptoms
• Sweating that soaks through clothing
• Visible dripping sweat unrelated to heat or exercise
• Sweating that disrupts daily or social activities
• Cold, clammy hands or feet
• Skin irritation or infection in sweaty areas
Diagnosis
Hyperhidrosis is usually diagnosed from a description of symptoms, pattern and triggers. If sweating is widespread, started suddenly in adulthood, or occurs with other symptoms (weight loss, night sweats, palpitations), further tests may be needed to rule out an underlying cause such as a thyroid problem
Treatment
Stronger antiperspirants containing aluminium chloride are usually the first treatment, applied at night to affected areas. Other options for persistent cases include prescription treatments, iontophoresis, or botulinum toxin injections for severe underarm sweating
Prevention and self-care
• Apply antiperspirant to clean, dry skin before bed
• Wear breathable natural fabrics
• Change socks and clothing regularly
• Avoid known triggers such as spicy food, caffeine or alcohol if they worsen symptoms
• Keep affected skin clean and dry to reduce irritation
• Manage stress, as anxiety can trigger flares
Reviewed by Hamza Iqbal Naheed, Superintendent Pharmacist, GPhC 2209194 (check the register) · Last updated 21 September 2026