Blisters are medically referred to as blisters. Sudden blisters on the fingertips may be due to herpes sweat, ringworm, physical and chemical factors. 1. Sweat herpes: a disease that occurs on the palms of the hands and feet, fingers and toes on both sides, manifesting itself as symmetrical small rice-like blisters on the affected area, accompanied by itching, blisters broken or dried up after the newborn skin is tender, easy to have a slight pain in the symptoms. Generally hot weather, late spring and early summer is more common, winter weather cooling sweating will reduce the self-healing. 2. Ringworm: mainly caused by red fungus, ringworm fungus and other infections, often clinically manifested as a dense appearance of small blisters, blisters dry after crusting and flaking, accompanied by itching, burning sensation. 3. Physical and chemical factors: such as hot water burns, often friction and other conditions, can also lead to sudden blisters on the fingertips. Sudden blisters on the fingertips may also be other reasons, it is recommended to go to the hospital, after the doctor’s consultation standardized treatment.