Understanding Excessive Sweating Treatment Options

Last updated: 11 February 2026

Hyperhidrosis — excessive sweating beyond what is necessary for thermoregulation — affects approximately 3% of the UK population, equating to nearly 2 million people. Yet despite its prevalence and significant impact on quality of life, hyperhidrosis remains dramatically underdiagnosed and undertreated. Many sufferers endure years of embarrassment, social limitation, and practical difficulty before seeking help. This comprehensive guide examines the condition, its causes, and the full spectrum of treatment options available in the United Kingdom.

Understanding Hyperhidrosis

Primary vs. Secondary Hyperhidrosis

Primary focal hyperhidrosis accounts for approximately 90% of cases. It typically begins in adolescence or early adulthood and affects specific areas — most commonly the axillae (underarms), palms, soles, and face. The condition is bilateral and symmetrical, absent during sleep, and frequently has a genetic component (up to 65% of patients have a family history). Its cause is an overactivity of the eccrine sweat glands, driven by excessive sympathetic nervous system stimulation.

Secondary hyperhidrosis is caused by an underlying medical condition or medication. It tends to produce generalised (whole-body) sweating, may occur during sleep, and can start at any age. Causes include thyroid disorders (hyperthyroidism), menopause, diabetes, obesity, infections, neurological conditions, and medications including SSRIs, opioids, and some blood pressure drugs. Identifying and treating the underlying cause is the priority in secondary hyperhidrosis.

The Impact

The psychological and practical burden of hyperhidrosis should not be underestimated. Research published in the British Journal of Dermatology has shown that the quality-of-life impact of hyperhidrosis is comparable to severe psoriasis and chronic kidney failure. Sufferers report interference with work (difficulty gripping tools, handling papers, typing), social life (avoidance of handshakes, dark clothing choices, social withdrawal), romantic relationships, and self-esteem.

Treatment	Mechanism	Suitable For	Duration	Sessions	UK Cost
Clinical antiperspirants	Aluminium chloride blocks sweat ducts	All areas (first-line)	Ongoing use	Daily	£5-£15/bottle
Botulinum toxin	Blocks acetylcholine at sweat glands	Axillae, palms, forehead	4-9 months	1 per cycle	£400-£800
Iontophoresis	Electrical current disrupts sweat gland function	Palms, soles	Ongoing	3×/week initially	£100-£500 (device)
miraDry	Microwave energy destroys sweat glands	Axillae only	Permanent	1-2	£2,000-£3,500
Oral medications	Anticholinergic systemic effect	Generalised sweating	Duration of use	Daily	NHS prescription
Endoscopic sympathectomy	Nerve transection	Palmar (severe cases)	Permanent	1	£3,000-£6,000

Treatment Options: A Stepped Approach

Step 1: Clinical-Strength Antiperspirants

The first-line treatment for all types of focal hyperhidrosis is a clinical-strength antiperspirant containing 20-25% aluminium chloride hexahydrate (available in the UK as Driclor or Anhydrol Forte, both available over the counter or on prescription). These work by forming temporary plugs in the sweat duct openings, physically blocking sweat from reaching the skin surface.

Application should be to completely dry skin at bedtime (when sweat glands are least active). Irritation is common initially but usually settles with continued use. For many patients with mild-to-moderate hyperhidrosis, clinical antiperspirants provide adequate control.

Step 2: Botulinum Toxin Injections

For axillary hyperhidrosis that does not respond adequately to topical treatments, botulinum toxin injections are the next step and represent one of the most effective treatments available. Botulinum toxin blocks the release of acetylcholine at the sympathetic nerve endings that stimulate eccrine sweat glands, effectively “switching off” sweat production in the treated area.

Treatment involves multiple small intradermal injections across the affected area (typically 15-20 injection points per axilla). The Minor’s iodine-starch test may be performed beforehand to map the precise area of maximum sweating. A topical anaesthetic cream or ice is used for comfort. The procedure takes approximately 30 minutes for both underarms.

Results become apparent within 2-7 days and typically last 4-9 months, with most patients experiencing 6-7 months of significantly reduced sweating. Repeat treatments are required to maintain the effect. UK costs range from £400-£800 per treatment session.

Importantly, botulinum toxin for axillary hyperhidrosis is available on the NHS in some areas, typically after failure of topical treatments. NICE Technology Appraisal guidance supports its use for severe primary axillary hyperhidrosis. Referral through a dermatologist is usually required.

Step 3: Iontophoresis

Iontophoresis is a technique that passes a mild electrical current through water to the skin’s surface, disrupting sweat gland function. It is particularly effective for palmoplantar (hand and foot) hyperhidrosis. The patient immerses their hands or feet in shallow trays of water through which a low-level electrical current is passed. Sessions last 20-30 minutes and are performed 3-4 times weekly initially, reducing to weekly maintenance once control is achieved.

Home iontophoresis devices are available for approximately £300-£500, making this a cost-effective long-term option. NHS physiotherapy departments may also offer iontophoresis treatment. Tap water iontophoresis is effective for approximately 85% of palmoplantar hyperhidrosis patients.

Step 4: miraDry (Microwave Thermolysis)

miraDry is a non-invasive device that delivers precisely controlled microwave energy to the dermal-subdermal junction of the underarms, where eccrine and apocrine sweat glands reside. The thermal energy destroys the sweat glands, which — crucially — do not regenerate. This makes miraDry a permanent solution for axillary hyperhidrosis.

Treatment takes approximately 60 minutes per session. Local anaesthesia (tumescent technique) is administered for comfort. Most patients require 1-2 sessions spaced 3 months apart. Studies report an average 82% reduction in underarm sweating after two sessions. As an additional benefit, miraDry also reduces underarm odour (by destroying apocrine glands) and underarm hair (by damaging hair follicles in the treatment zone).

miraDry is only suitable for the underarms — it cannot be used on the palms, soles, or face. UK costs range from £2,000-£3,500 for a complete treatment course.

Step 5: Oral Medications

For generalised hyperhidrosis or focal hyperhidrosis not adequately controlled by the above measures, oral anticholinergic medications such as oxybutynin, propantheline, or glycopyrronium bromide may be prescribed. These work systemically by blocking the acetylcholine receptors that stimulate sweat glands. Side effects include dry mouth, constipation, blurred vision, and urinary retention, which limit tolerability for some patients.

Step 6: Surgical Options

Endoscopic thoracic sympathectomy (ETS) involves surgical interruption of the sympathetic nerve chain responsible for stimulating sweat glands. It is most effective for palmar hyperhidrosis, with success rates exceeding 95%. However, compensatory sweating (increased sweating in other body areas) occurs in up to 80% of patients and can be as bothersome as the original problem. Due to this significant side effect, ETS is reserved for severe cases that have failed all other treatments.

Living with Hyperhidrosis: Practical Advice

Alongside medical treatment, practical strategies can help manage daily life with hyperhidrosis. Wear breathable, natural fabrics (cotton, linen) or moisture-wicking technical fabrics. Carry a spare shirt or blouse for important occasions. Use absorbent insoles for plantar sweating. Keep hand towels at your desk. Use sweat-proof undershirts. Apply antiperspirant at bedtime for maximum efficacy. Stay hydrated despite the temptation to limit fluid intake.

Frequently Asked Questions

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