Anhidrosis, sometimes referred to as hypohidrosis, sudomotor dysfunction or sweating dysfunction, is an abnormal lack of sweat in response to heat - the person's body is unable to sweat normally.
Anhidrosis is the complete absence of sweating, while hypohidrosis is sweating less than normal.
If the human body cannot sweat properly it cannot cool itself, which is potentially harmful. Sweating allows heat to be released from the body.
If the lack of sweating affects a small area of the body, it is not usually dangerous. However, overall anhidrosis or hypohidrosis can result in overheating and eventually heatstroke, a potentially life-threatening condition.
According to the National Institute's of Health, people with anhidrosis may not know they have the condition until a significant amount of heat or exertion fails to induce proper sweating.
What are the signs and symptoms of anhidrosis?
A symptom is something the patient feels and describes to others, such as tiredness or pain. A sign, on the other hand, can be detected by others (as well as the patient), such as a rash or swelling.
The most common signs and symptoms associated with anhidrosis are:
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