Hyperhidrosis (Excessive Sweating)

Hyperhidrosis is a condition characterised by excessive sweating beyond what is required for normal temperature regulation. It commonly affects the underarms, hands, feet, and face, and can significantly impact daily life, confidence, and social interactions.

Many patients report needing to change clothing frequently, difficulty with handshakes or writing, and avoidance of social or professional situations.

What causes hyperhidrosis?

Hyperhidrosis is usually due to overactivity of the nerves that stimulate sweat glands.

It may occur:

• Without an identifiable cause (primary hyperhidrosis)
• In association with medical or neurological conditions (secondary hyperhidrosis)

How treatment works

Botulinum toxin is injected into the affected area to block the nerve signals that activate sweat glands.

This results in:

• Reduced sweating in the treated area
• Improved comfort and confidence
• Minimal systemic side effects

Who this is for

This treatment may be suitable for patients with:

• Axillary (underarm) hyperhidrosis
• Palmar (hand) hyperhidrosis
• Plantar (foot) hyperhidrosis
• Facial sweating

It is particularly useful for patients who:

• Have not responded to topical treatments
• Prefer to avoid oral medications
• Require a longer-lasting solution

What to expect

• Performed in the clinic
• Multiple small injections to the affected area
• Typically takes 15–30 minutes
• Minimal downtime

Results usually begin within 1–2 weeks and last 4–6 months.

How this differ from other treatments

Hyperhidrosis can be managed in several ways:

• Topical treatments (e.g. antiperspirants) — often first-line but may be insufficient
• Oral medications — may have systemic side effects
• Botulinum toxin — provides a targeted, local treatment with predictable results

When to consider referral

Referral may be appropriate for patients with:

• Persistent excessive sweating affects daily activities
• Significant impact on work, social interaction, or confidence
• Inadequate response to topical or medical therapies

Why GC Rehab

Specialist rehabilitation physician with experience in injection-based treatments and ultrasound-guided procedures.

FAQs

How effective is treatment?
Most patients experience a significant reduction in sweating.

How long does it last?
Typically 4–6 months.

Is it painful?
Generally well tolerated with minimal discomfort.

Are there side effects?
Side effects are usually mild and localised.