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This is a medical condition that causes excessive sweating. The word “hyperhidrosis” means too much (hyper) sweating (hidrosis). Excessive sweating happens when a person sweats more than is necessary. Yes, it’s necessary to sweat. Sweating cools the body, which prevents us from overheating. People who have hyperhidrosis, however, sweat when the body does not need cooling.

Many people who have hyperhidrosis sweat from one or two areas of the body. Most often, they sweat from their palms, feet, underarms, or head. While the rest of the body remains dry, one or two areas may drip with sweat.

This excessive sweating can interfere with everyday activities. Hands can be so sweaty that it becomes difficult to turn a doorknob or use a computer. Sweat from the underarms often soaks through clothes, causing obvious sweat marks. Because the skin is often wet, skin infections can develop.Dermatologists help many patients control excessive sweating. Before treatment begins, it is important to find out why a patient has excessive sweating.

How do dermatologists diagnose hyperhidrosis?

To diagnose this condition, a dermatologist gives the patient a physical exam. This includes looking closely at the areas of the body that sweat excessively. A dermatologist also asks very specific questions. This helps the doctor understand why the patient has excessive sweating.

Sometimes medical testing is necessary. Some patients require a test called the sweat test. This involves coating some of their skin with a powder that turns purple when the skin gets wet.

To find an underlying medical condition, other medical tests may be necessary.

How do dermatologists treat hyperhidrosis?

Treatment depends on the type of hyperhidrosis and where the excessive sweating occurs on the body. Your dermatologist also considers your overall health and other factors.

Side effects

The most common one is temporary muscle weakness, which can occur when this is injected into the hands..


By seeing a dermatologist, many people find treatment that effectively controls their excessive sweating. This often greatly improves their quality of life.

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Botulinum toxin injections

Your dermatologist can inject a weak form of this medicine into your underarms. To treat excessive sweating, a patient will need to have very tiny amounts injected in many areas of the underarms. When performed properly, patients have little pain or discomfort.

Uses: Underarms

How it works: The injections temporary block a chemical in the body that stimulates the sweat glands. Most patients notice results 4 to 5 days after receiving treatment.

Reduced sweating lasts about 4 to 6 months — and sometimes longer. When the excessive sweating returns, you can be retreated.