Botox to combat excessive sweating – how does it work?

A syringe held by a gloved handSummer looks to be arriving at long last, which is great news for most of us, but for those who are prone to excessive sweating (hyperhidrosis), the increased temperature can be a cause for concern.

It’s no fun to be sat in the office, or out for the evening, with visible wet patches under your arms – and it can be just as uncomfortable as it is embarrassing.

So what causes excessive sweating, or hyperhidrosis?

The human body produces two types of sweat – thick, oily sweat secreted by the appocrine glands, and thin, watery sweat produced by the eccrine glands.

Hyperhidrosis is generally caused by having overactive eccrine glands, producing an excess of the watery type of sweat, which dampens the skin and soaks into clothes.

The worst affected areas are usually the palms of the hands (palmar hyperhidrosis), the soles of the feet (plantar hyperhidrosis) and the armpits (axillary hyperhidrosis).

Factors which can make the sweating worse include heat, humidity, exercise, stress, illness and the menopause, among others.

How does Botox help to treat hyperhidrosis?

During the procedure, approximately 20 Botox injections are administered into the area to be treated, after an initial starch iodine test to determine which specific areas need most attention.

When the Botox is injected into the affected area, it suppresses the nerve impulses to the sweat glands. This weakens the signals to secrete, and sweating is dramatically reduced as a result.

It usually takes about one week after treatment to really begin to notice a difference.

Does Botox permanently cure hyperhidrosis?

An area treated with Botox will generally see a reduction in sweating for around 6 months, depending on the individual. Thereafter, treatment will need to be topped up roughly every 6 months to maintain the effects.

So, while Botox isn’t a one-off “solution” to the problem of excess sweating, it does offer long-lasting results and can be used very effectively to keep the problem at bay.

If you would like to talk to us in confidence about Botox treatment for excessive sweating, email us at or give us a call on 01844 211777 to arrange a free consultation.

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