Condition
Excessive Sweating (Hyperhidrosis)
Hyperhidrosis is a physiological condition characterised by sweat production far beyond what is required for normal thermal regulation. Often affecting the axillae (underarms), palms, or forehead, it can cause deep self-consciousness, wardrobe restrictions, and social embarrassment despite the use of clinical antiperspirants.
What is Excessive Sweating (Hyperhidrosis)?
Primary focal hyperhidrosis occurs when the sympathetic nervous system sends overactive signals to eccrine sweat glands, causing them to produce excessive sweat even when at rest or in cool environments. Specialized medical botulinum injections temporarily block the chemical messenger (acetylcholine) that activates these sweat glands, dramatically drying the treated area without affecting the body's overall ability to cool itself.
Common signs and concerns
- Visible sweat rings soaking through clothing shortly after dressing
- Need to change shirts multiple times daily or wear concealing dark layers
- Underarm sweating occurring regardless of ambient temperature or exertion
- Clammy, wet palms interfering with handshakes, writing, or touchscreens
- Skin irritation, chafing, or breakdown from chronic moisture
Possible contributing factors
- Overactivity of the autonomic sympathetic nervous system
- Family history and genetic predisposition
- Emotional stress, anxiety, or performance situations exacerbating sweating
- Hormonal transitions (perimenopause, thyroid hyperactivity)
When to seek professional assessment
Arrange a consultation if excessive sweating interferes with your career, clothing choices, or personal confidence. Sudden generalized sweating across the entire body or drenching night sweats should be investigated by your GP to exclude systemic medical causes.
How Dr Farzana assesses this concern
Dr Farzana begins with a private medical consultation: your history, skin type, previous treatments, medication and daily routine are reviewed before the area is examined in good light. Where relevant she will discuss photography for your own records, explain which changes are realistically treatable and which are not, and set out a staged plan with review points.
Explore Treatment Options
These are options offered by Dr Farzana that may be discussed for this concern. Which, if any, is appropriate for you is decided only after a private medical assessment.
Suitability and important information
This page is general information only and is not medical advice or a diagnosis. Suitability for any treatment is confirmed at a private medical consultation, including a review of your history, medication and goals. Risks, alternatives, aftercare and realistic outcomes are discussed openly. Results vary between individuals and no treatment is suitable for everyone.
Frequently asked questions
What causes primary focal hyperhidrosis?+
It is caused by hyperactive sympathetic nerve signals stimulating eccrine glands into producing sweat without a temperature or exercise trigger.
How effective are botulinum injections for underarm sweating?+
Clinical studies demonstrate an 80% to 90% reduction in underarm sweat production, typically noticeable within 48 to 72 hours and fully established by day 14.
Will treating the underarms cause sweating to increase elsewhere?+
The underarms contain only 2% of the body's millions of sweat glands. Thermoregulation continues normally across the rest of the body, and compensatory sweating elsewhere is extremely rare with focal axillary treatment.
How long do the results of hyperhidrosis treatment last?+
Most patients enjoy 6 to 9 months of dryness and freedom from sweat stains before a repeat treatment is required.
Related conditions
Where Dr Farzana practises
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