Excessive Sweating (Hyperhidrosis)

Excessive sweating (or hyperhidrosis) is a chronic condition affecting over 1.5 million people in the UK. Sweat is produced to regulate body temperature, but hyperhidrosis sufferers produce an amount of sweat that far exceeds that needed for temperature regulation.

Body odour is often a problem due to mixture of sweat with bacteria and hair in the underarms, and clothing has visible stains due to the consistency of sweat secretions within the area. With over 2 million sweat glands in the body, the majority are found in the underarms, which is why we sweat more from here.


Our body is designed to sweat in order to help us regulate our core temperature, especially during periods of excessive heat, exercise and even during illness. When sweat evaporates, it removes excess heat from the body, and we cool down. Excessive sweating is not just an issue during the summer months and can affect people all year round.


There are two main types:

  • Local Hyperhidrosis (limited to a specific area of the body), such as palms of the hands, armpits, on the face and feet

  • General Hyperhidrosis (the entire body is affected) usually caused by an underlying health condition such as an overactive thyroid gland.

Read our top tips to help reduce sweating

Read our top tips to help reduce sweating

What Causes Hyperhidrosis?

Hyperhidrosis most frequently develops in adolescence or young adulthood (between 20–25 years), and affects both men and women equally.

The underlying cause is uncertain but genetics may play a role as two thirds of patients have a family history of the condition. It is thought hyperhidrosis may be exacerbated by stress, emotion or exercise, but all too often occurs spontaneously.

What treatments do you offer?

At S-Thetics, we treat underarm hyperhidrosis with injections of botulinum toxin into the affected areas.

Botulinum toxin is injected into the skin in small doses and works by blocking the signals from the brain to the sweat glands, in turn reducing the amount of sweat produced.

The effects last approximately 4–7 months on average, depending on the individual.

Are these treatments suitable for me?

This will be discussed in your consultation, but generally botulinum toxin injections can be used very effectively for people who are suffering from excessive sweating under their arms.

Are there any side effects?

As with any medical procedure, there is always a risk of unwanted side effects with botulinum toxin injections. Most side effects are normally short-lived and often relate to the injection procedure.

Following injection, there may be redness, slight swelling, or bruising around the injection area but these usually only last a few days.

For best results, avoid massaging the area that has been treated and avoid exercise and alcohol for 24 hours after treatment. Otherwise, you should be able to resume your usual activities straight away.

Treatment enquiry / booking
Fill out the form below and we'll be in touch about your enquiry / booking


We take pride in delivering the very best treatments to our patients and tailoring our approach to each individual. Here’s what some of our patients have been saying about us:


Click on the links below to find out more about the range of treatments available at S-Thetics.

  • body
  • Face

STAY connected with us

Follow us to hear the latest news about S-Thetics @missbalaratnam

Sign up to our newsletter
Request a callback