The condition of excessive sweating.

Hyperhidrosis is the name given to excessive sweating. Hyperhidrosis may affect the entire body, or it may be localized to the armpits, palms or soles. Hyperhidrosis may occur in childhood or start later in life. An increase in air temperature, exercise, fever, anxiety, or spicy food may cause sweating. Sweating usually reduces at nighttime, but can continue throughout the day.