Approximately 4 million sweat glands cover the body and produce the clear liquid that we know as sweat. The body produces sweat to help regulate its temperature. Certain triggers can cause us to sweat, including warm temperatures, exercise, nervousness, fear, or embarrassment. In people with hyperhidrosis, the amount of sweat produced is greater than normal and may occur even when the surrounding temperature is cool.
Hyperhidrosis usually happens in people aged 25 to 64, although younger people may also be affected. Interruptions to daily activities as well as other social disruptions caused by excess sweat are a common result of this condition. In some cases, people don't seek treatment from a doctor because they do not realize that treatment exists to reduce the amount of sweat a person produces.