The excessive sweating that characterizes hyperhidrosis is usually most active in the hands, feet, armpits, and groin. This is due to the relatively large number of sweat glands.
- Focal hyperhidrosis is a condition in which excessive sweating is confined to a specific area. For example, palmoplantar hyperhidrosis is abnormally profuse sweating of the palms and soles of the feet.