In summer, the hands are always peeling off skin, and the possible clinical causes are herpes sweat, tinea versicolor, and keratolytic dermatolysis bullosa. 1. herpes sweat: this condition refers to the blistering skin disease that occurs symmetrically on the hands and feet, which is related to allergies, dermatophyte infections, or psychiatric factors, etc. The clinical manifestation is the appearance of intensely itchy blistering lesions on the hands and feet, and the peeling off of the skin in the later stage after the blisters dry up. 2. Ringworm: the disease refers to the superficial fungal infection of the hand skin caused by the dermatophytes, which mainly violates the palm of the hand, the thumb and other parts of the tiger’s mouth, clinical manifestations for the affected areas of blisters, drying and flaking. 3. Keratosis Pilaris: This disease refers to the exfoliative dermatosis of the keratin layer of the palm and metatarsal, which is related to emotional anomalies, heredity, sweating and other factors, with clinical manifestations of recurrent scaling and peeling of the affected areas, which mainly affect the soles of the feet and the palms of the hands. It is recommended that people with related symptoms should go to the dermatology department of the hospital, and usually check to make a clear diagnosis, so as to carry out targeted treatment.