Types and causes Primary focal hyperhidrosis usually begins in childhood or adolescence and affects specific areas symmetrically. Secondary hyperhidrosis may involve much of the body and can be linked to medicines, hormonal changes, infections or other medical conditions.
Diagnosis Assessment includes when sweating began, affected areas, nighttime symptoms, medicines and general health. Sudden widespread sweating or sweating during sleep may require investigation for an underlying cause.
Treatment Options may include strong antiperspirants containing aluminium salts, prescription wipes or creams, iontophoresis for hands and feet, botulinum toxin injections, oral medicines or selected procedures for resistant cases. Treatment choice depends on the site, severity and side-effect profile.
Practical care Wear breathable fabrics, change damp clothing promptly and use moisture-absorbing socks or shoe inserts. Skin irritation and fungal infection should be treated if they develop.
Seek medical assessment for sudden onset, night sweats, weight loss, fever, chest symptoms or sweating that follows a new medicine.
Frequently Asked Questions
Is excessive sweating always caused by heat?
No. Hyperhidrosis can occur even when the body does not need cooling.
Can botulinum toxin help?
It can reduce sweating in selected areas for a limited period.
Are night sweats typical of primary hyperhidrosis?
They are less typical and may require assessment for another cause.
Can hyperhidrosis affect mental wellbeing?
Yes. It may affect confidence, work and social activities.
This information is for education only and does not replace medical assessment or treatment by a qualified physician.