The common causes of old sweaty palms are: 1. People with heavy damp heat in the body are prone to sweaty palms, mainly caused by excessive excitability of the sympathetic nervous system. 2. Hand sweating, also known as restrictive hyperhidrosis, is a common functional local abnormal sweating of unknown origin. 3. Sweaty palms may be caused by improper function of the spleen and stomach. If the distribution of sweat glands in the palm of the hand is more vigorous, the palm of the hand is also prone to sweating. 5, sweating, flaking, itching, blisters, etc. will occur when there is a fungal infection in the palm of the hand, it is recommended to use terbinafine cream, miconazole nitrate cream locally for treatment. There are many reasons for sweaty palms, so it is recommended to pay attention to the cleaning of the palms, keep the local clean and dry, and reduce the stimulation of sweat on the local skin to avoid local skin bacterial growth.