Anal pruritus refers to a skin condition in which the skin around the anus, without any primary skin damage, has only pruritic symptoms. It occurs most often in adolescents between the ages of 20 and 40, and is more common in men than women. Common causes: first, food factors, such as spicy foods and condiments; second, allergic reactions, allergies to certain proteins, drugs, pollen, etc. can be caused; third, mental factors, mental overexcitement, depression or neurasthenia, etc. Then there are fungal and viral infections of the perianal skin. In terms of treatment, we should actively search for and get rid of possible causative factors, use topical anti-itch drugs, and block local subcutaneous sensory nerves if necessary. For external treatment, dry powdered alum can be sprinkled on the affected area if the skin is moist. For those with dry skin, Huang Lian cream or Qing Dai cream can be applied externally. In addition, you can use Chinese medicine fumigation bath, such as the use of snake bed seeds, skin, bitter ginseng, Qin Pi, and alum, boiled hot water fumigation bath, 1-2 times a day, each time 15-20 minutes, the effect is quite good.