A new UCLA study in the February issue of the Journal of Vascular Surgery shows strong evidence that sweaty palms syndrome is genetic. It may be caused by a dominant gene — indicating that family members of those who have the disorder may suffer from it more than has been previously reported.

Why does my child have clammy hands?

When excessive sweating is localized to a child's hands, it is called palmar hyperhidrosis. Extra sweating in the hands is normal when a child is anxious or has a fever. However, when the condition is excessively chronic, it may be hyperhidrosis.

Are clammy hands common?

The palms of your hands and the soles of your feet have more sweat glands than any other part of your body. Some people have hands and feet that sweat a lot. This problem is common and can be very embarrassing. Sweaty hands and feet usually are not caused by a disease.