Health Encyclopedia

Sweating - absent

Definition

An abnormal lack of sweat in response to heat may be harmful, because sweating allows heat to be released from the body. The medical term for absent sweating is anhidrosis.

Alternative Names

Decreased sweating; Anhidrosis

Considerations

Anhidrosis sometimes goes unrecognized until a substantial amount of heat or exertion fails to cause sweating.

Overall lack of sweating can be life threatening because the body will overheat. If the lack of sweating happens in a small area only, it is usually not as dangerous.

Common Causes

Burns
Certain genetic syndromes
Certain nerve problems (neuropathies)
Congenital disorders including as ectodermal dysplasia
Dehydration
Neurologic disorders such as Guillain-Barre syndrome
Skin diseases that block sweat glands
Trauma to sweat glands
Use of certain drugs

Home Care

If there is a danger of overheating, take a cool shower or sit in a cool bathtub and drink plenty of fluids. Remain in a cool environment. Move slowly during hot weather. Avoid heavy exercise and hot foods.

Call your health care provider if

Call your health care provider if you have a general lack of sweating or an abnormal lack of sweating when exposed to heat or strenuous exercise.

What to expect at your health care provider's office

The doctor will perform a physical exam. In emergencies, the health care team will perform rapid cooling measures and give you fluids to stabilize you.

Your doctor may ask you questions about your symptoms and medical history. You may be given drugs to cause sweating.

You may be asked to wrap yourself in an electric blanket or sit in a sweatbox while the health care team watches your body's reaction.

A skin biopsy may be done.

Review Date:4/10/2009
Reviewed By:Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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