Strenuous physical activity and warm temperatures are commonly associated with excessive sweating. You may also sweat excessively as a result of a fever.
Excessive sweating that affects large areas of the body and that occurs while you're awake and asleep is likely a side effect of a drug or a sign of a disease or condition, such as menopause hot flashes, anxiety or overactive thyroid.
Excessive daytime sweating of the palms, soles and underarms for no apparent reason is known as focal hyperhidrosis. This type of excessive sweating typically stops when you're sleeping and isn't associated with an underlying condition.
Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.