The groin is in a relatively closed area, and the sebaceous and sweat glands in the groin area are more densely distributed, especially the secretion of the sweat glands. In a dark and humid environment, especially in the summer, there is a possibility of secretion of the sweat glands, which increases sweat, and at this time it is possible to feel damp in the groin area frequently. In the groin area due to the humid environment it is easy to complicate the infection of the fungus ringworm, which leads to severe itching and flaking of the patient. If scratching is frequent, even mossy changes of the skin in the groin area may occur. When the groin area is frequently moist, it is recommended to pay attention to maintaining personal hygiene and washing frequently, as well as to keep the groin area clean and dry.