Botox for Excessive Underarm Sweating (Hyperhidrosis)

hyperhidrosis guide

What is Hyperhidrosis?

Hyperhidrosis is defined as excessive and uncontrollable sweating in a particular body area.

Most of the time, hyperhidrosis is caused by an overactive nerve supply to the sweat glands that result in its overstimulation which leads to extra and at times, excessive sweat production.

Excessive sweating can be made worse by:

Heat / hot environment

Anxiety and stressful situations

In the sweltering and humid heat of Singapore, Hyperhidrosis can unfortunately lead to a negative impact on the quality of life for those affected.

Common areas to experience Hyperhidrosis


2 commonly treated areas are sweaty underams and sweaty palms.

Hyperhidrosis of the underarms (excessive underarm sweating) may cause staining of the clothes (a.k.a the pits stain) and body odour which may lead to socially embarrassing situations. 

Hyperhidrosis of the hands (sweaty palms) may also negatively impact self-confidence when one is needed to shake hands or hold hands with others during social interactions. 

The stress of psychological embarrassment and social stigma is usually the primary driving force behind individuals seeking treatment for excessive sweating.

Treatment Options

Various treatment options exist for effectively treating hyperhidrosis.

The least invasive treatment approach would be applying topical antiperspirants such as aluminum chloride solution which reduces sweat production by blocking the opening of the sweat ducts.

However, one side effect of topical antiperspirants is that patients may experience skin irritation (dermatitis) after prolonged application.

Surgery can help address the overactive nerve supply to the sweat glands which cause hyperhidrosis. However, since it is invasive, it is limited as the last resort. It is associated with other potential side effects such as neighboring nerve injury.

Dr Edwin prefers to use Botox injections to treat Hyperhidrosis as it is minimally invasive with little to no downtime, and is both safe and effective.

How does Botox help Hyperhidrosis?

Sweat glands produce sweat after being activated by a chemical that transmit signals to the nerves called acetylcholine.

Botox injections stop the release of acetylcholine from the overactive nerves supplying the sweat glands.

No signals = No sweat gland activation = No sweat production

Furthermore, Botox has been well studied in the treatment of hyperhidrosis and is reported to be both safe and more effective than topical anti perspirants.

Botox Underarm Sweating Treatment Experience

Botox Underarm Sweating Treatment

At the clinic, numbing cream will first be applied to the entire treatment area for around 30 minutes. The numbing cream will help reduce discomfort as much as possible.

Next, Dr Edwin will mark out the injection points to evenly cover the underarm. For example, each underarm may require 20 to 25 injection points to adequately target all the sweat glands.

Each injection point will contain 2 units of Botox.

The injections are administered using a tiny needle which feel like a small prick / ant bite. After injection, small mosquito bite like bumps containing the botox will be present throughout the treatment site.

These bumps will subside after 4 to 6 hours.

Patients are advised not to massage the botox bumps and to avoid cosmetics / makeup to the area on the day of the treatment.

What are the risks of Botox treatments for Underarm Sweating?

Bruises and swelling are rare and can be improved with the application of the intensive recovery cream.

Botox for hyperhidrosis is a safe treatment and harmful effects on the nerves and muscles are extremely rare and unlikely.

Is there downtime after Botox Underarm treatment?

There will be small botox containing bumps over the treatment site which will subside after a few hours.

Patients can resume their normal daily activities straight away after treatment.

How long do Botox results for Hyperhidrosis last for?

On average, results may last between 4 to 6 months and patients are recommended to repeat treatments every 4 to 6 months for optimum results.

What is the cost for Underarm Hyperhidrosis Botox?

Our clinic charges between $11.50 to $15 per unit of Botox depending on the type of Botox package purchased.

Botox for Excessive Underarm Sweating (Hyperhidrosis)