Sweat herpes and tinea cruris can be distinguished from each other in terms of causes and symptoms. 1. Herpes sweat: the etiology of herpes sweat is not completely clear, may be related to heredity, local allergies, dermatophyte infection, ultraviolet radiation, etc., while the climate is hot and humid, emotional stress, etc. is a triggering factor. Sweat herpes mostly occurs on the hands and feet, mainly manifested by the appearance of intensely itchy blisters on the skin, mostly symmetrically distributed, and may be accompanied by other symptoms such as tingling, burning sensation and so on. Sweat herpes is usually the size of a needle tip to a grain of rice, containing clear plasma, and the blisters are slightly above the surface of the skin, the surrounding skin is normal, no inflammatory reaction. Also, most blisters do not rupture on their own and can be absorbed naturally. Generally, the disease can be diagnosed through visual examination, fungal culture, patch test and so on. 2. Ringworm: ringworm is caused by dermatophyte infection, which is a kind of infectious disease, and local dampness and sweating, low immunity are the triggers. In the early stage of the disease, small blisters will appear on the patient’s hands, followed by flaking, keratinization and thickening, which may also be accompanied by itching. Tinea versicolor damage is mostly limited to one side, often starting from the thumb, palm and other parts of the hand gradually involved the whole palm. Patients may seek medical attention for fungal microscopy, fungal culture, etc., which will reveal fungal hyphae or spores, and the results will be positive. It is recommended that people with skin abnormalities of the hands should consult a regular hospital for examination, so that the disease can be clearly diagnosed and treated according to the doctor’s instructions.