Concern — functional Botox

Excessive sweating (hyperhidrosis)

When your underarms sweat far more than your body needs to cool down — a nerve-and-gland problem, not a hygiene one. Anti-wrinkle injections quieten the signals that overstimulate the sweat glands, so you stay dry for months.

What's happening

What causes excessive underarm sweating

Your underarms contain thousands of eccrine sweat glands. These glands are controlled by nerves — when the nervous system signals them to produce sweat, they do. In hyperhidrosis, those signals are overactive. The glands get told to sweat too much, too often, even when the body is cool and at rest.

It's not caused by poor hygiene, being unfit, or eating the wrong things. It's a nerve-signal problem — the glands are being told to produce more sweat than the body needs. Stress, heat and certain triggers can make it worse, but the root cause is overactive nerve signalling to the glands.

Why antiperspirants and creams can't fix this

Why surface treatments don't reach it

Strong antiperspirants (the ones with aluminium chloride) work by physically blocking the sweat ducts at the surface. But the glands are still being told to overproduce — so the sweat just builds up behind the blockage, and many people find the effect weak or short-lived. Some develop irritation from the strong chemicals needed.

Creams and topical treatments sit on the skin and can't reach the nerves that drive the overproduction. They can mask the problem temporarily, but they can't quieten the signal that's causing it. To reduce the sweating at its source, you need to interrupt the nerve telling the gland to overproduce.

How we treat it

Anti-wrinkle injections — the treatment that quiets the signal.

The same prescription-only botulinum toxin used for wrinkles is injected in a grid pattern across the underarm skin. The toxin blocks the nerve endings that signal the sweat glands. Without the signal, the glands stop overproducing. You still sweat normally elsewhere — the treatment only affects the area where it's placed.

Why this treatment, specifically

Hyperhidrosis is a nerve-signal problem — the treatment has to block the signal.

Nothing else interrupts the nerve-to-gland communication. Antiperspirants block the ducts, not the signal. Creams can't reach the nerves. Oral medications act systemically (whole body) and carry side effects that aren't worth it for most people. Surgery (sympathectomy) cuts the nerves permanently — invasive and irreversible.

Anti-wrinkle injections are the only treatment that targets the nerve signal locally, at the gland, without surgery and without whole-body side effects. The toxin blocks the chemical messenger (acetylcholine) that tells the gland to sweat. No messenger = no excess sweat. It's precise, reversible, and repeatable.

This is functional Botox — the same molecule used for wrinkles, but here it's treating a function that's gone into overdrive, not a line on the skin.

What to expect

Your appointment, step by step

Consultation: Georgie assesses the severity and confirms hyperhidrosis is the cause. She'll ask about triggers, what you've already tried, and how sweating affects your daily life — clothing choices, confidence, social situations.
The treatment: A grid of small injections across each underarm, just under the skin surface. Most people describe it as mild pinprick discomfort, not pain. It takes about 15 minutes. No anaesthetic needed, though we can offer numbing if you're nervous.
After: No downtime. You may have small red marks at the injection sites that fade within the hour. Avoid exercise, hot showers, and deodorant for 24 hours.
When you'll see it: Sweat reduction begins within 3–7 days. By two weeks, most people see a dramatic reduction — you'll be able to wear what you want without worrying about sweat marks.
How long it lasts: Four to six months. Many clients time their top-up before summer or before a period they know will be stressful. The effect is fully reversible — when it wears off, sweating returns to its previous level (no rebound).
Your free 14-day review: We check the result at two weeks. If one area is still sweating more than expected, we can add a touch-up. Most people don't need one.

An honest word

What it can and can't do

Anti-wrinkle injections for hyperhidrosis are one of the highest-satisfaction treatments we offer — most people wish they'd done it years ago. But it's not a cure. The treatment wears off, and you'll need top-ups to maintain the effect. Some people find the first treatment lasts closer to four months, with later treatments lasting longer as the glands become less active over repeated cycles.

If your excessive sweating is part of a wider condition (generalised hyperhidrosis affecting the whole body, or triggered by an underlying issue like thyroid), we may suggest speaking to your GP alongside the treatment — underarm injections won't address sweating elsewhere. We'll be honest about that at consultation.

See the anti-wrinkle treatment page

Book a consultation with Georgie

Common questions

What gets rid of excessive underarm sweating?

Anti-wrinkle injections block the nerve signals that trigger the sweat glands, reducing sweating for roughly three to four months. It's a well-established treatment for hyperhidrosis.

What causes excessive underarm sweating?

Excessive sweating (hyperhidrosis) is caused by overactive eccrine sweat glands in the underarms. The glands receive too many nerve signals telling them to produce sweat, even when the body doesn't need to cool down. Stress, heat and genetics all play a role, but the root cause is the nerve signals overstimulating the glands — not poor hygiene or a sweat problem you can scrub away.

How do anti-wrinkle injections stop excessive sweating?

The same botulinum toxin used for wrinkles blocks the nerve signals that tell the sweat glands to produce. When the signal is interrupted, the glands go quiet. Most people see a dramatic reduction in sweating within a week, lasting four to six months.

How long does hyperhidrosis treatment last?

Results typically last four to six months. Most clients book a top-up before summer or before a stressful period. Your free 14-day review helps us judge the right interval for you.