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Hyperhidrosis is characterized by abnormal, excessive sweating. This may occur in one area, such as the hands, or in several areas, such as some combination of hands, feet, armpits and lower back. When just the hands are affected, it's called palmar hyperhidrosis; just the feet, plantar hyperhidrosis; just the armpits, axillary hyperhidrosis. The condition often shows up in childhood or adolescence.
Affecting about 1 percent of the population, this rare condition is equally common in boys and girls. While hyperhidrosis doesn't pose a health risk, it can have a serious impact on quality of life. Severely sweaty palms can make it hard to hold a pencil, keep school papers dry or use a touch screen. Children may feel embarrassed and anxious about interacting with or touching other kids.
Excessive sweating can be a symptom of certain underlying medical conditions, but in most cases, the cause is unknown. What's understood is that it's linked to the sympathetic nervous system, which stimulates the physical response to fear and stress. People with hyperhidrosis seem to have an overactive sympathetic nervous system.
Excessive sweating regardless of the temperature or emotional factors is the hallmark of hyperhidrosis. Hands may be so moist that it's difficult to grasp objects. Soaking-wet clothes, socks and shoes may lead to increased body odor.
The problem is often first noticed when it starts to interfere with school and social activities. At times, it may be associated with stress, strong emotions or exercise.
At UCSF, we offer a variety of approaches to hyperhidrosis. These include:
UCSF Benioff Children's Hospitals medical specialists have reviewed this information. It is for educational purposes only and is not intended to replace the advice of your child's doctor or other health care provider. We encourage you to discuss any questions or concerns you may have with your child's provider.
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