Excessive Underarm Sweating:
There's a Treatment That Actually Works

If you've lived with heavy underarm sweating, you'll know that deodorant eventually stops being the answer. You've tried the clinical-strength ones. Maybe you've changed what you wear, avoided certain colours, thought twice before shaking hands. It becomes something you manage rather than something you solve.

It doesn't have to stay that way.

What's actually going on

Excessive sweating — known medically as hyperhidrosis — isn't about hygiene or heat. It's a condition where the nerves controlling your sweat glands are permanently overactive. They fire when they shouldn't. Antiperspirants work at the surface of the skin, but they can't override a nervous system signal that's turned up too high. That's why they feel like they stop working — they were never really treating the root cause.

The injection treatment

There's a prescription injection that works differently. Rather than blocking the skin's surface, it temporarily interrupts the nerve signal that tells your sweat glands to produce sweat in the first place. The glands don't disappear — they just stop receiving the instruction to fire.

Your body's ability to regulate temperature isn't affected. Everything else keeps working as normal.

What an appointment looks like

It takes around 20 to 30 minutes. A series of small injections across the underarm area — most people describe it as brief pinpricks. No anaesthetic needed for most, no downtime. You can carry on with your day straight after.

Within a week, you'll notice a real difference. By two weeks, the full effect has usually settled in.

How long does it last?

Typically six to nine months. Most people come in twice a year — spring and autumn tend to work well as a rhythm. It's not permanent, but it's consistent and reliable each time.

Who is it for?

Anyone whose underarm sweating is affecting their daily life. That includes men — hyperhidrosis doesn't discriminate, and the treatment works the same regardless of gender. You don't need to have exhausted every other option first. If it's bothering you, that's enough reason to look into it.

Before any treatment

You'll have a consultation first — a relaxed conversation with our prescriber to confirm suitability and issue a prescription. No obligation to proceed. All treatments at our Knightsbridge clinic are carried out by qualified medical practitioners.

This treatment is prescription only and subject to a pre-treatment consultation. Results may vary between individuals.

Written by Gina Roche

Director of Knightsbridge Advanced Beauty since 1984. Gina is dedicated to combining expertise, innovation, and personalized care for every client.

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