Anal eczema actually refers to perianal eczema, which mostly affects the skin around the anus and can also extend to the perineum and external genitalia. Depending on the duration of the disease and the condition of the skin lesions, anal eczema can be clinically divided into acute and chronic types. The clinical symptoms mainly manifest as: in the acute phase, the skin around the anus is red and moist, with papules and skin erosions, while in the chronic phase, the local skin is infiltrated and thickened, with fissures, often accompanied by itching and pain.