The difference between the two is the presence or absence of skin lesions. If there is a small local red rash, or small blisters with oozing, it is perianal eczema, and if there is no skin change just itching, it is anal pruritus. If the itching is intense, you can use a decoction of Chinese herbal medicine such as Atractylodes, Dioscorea, Amaranthus, Bitter Ginseng, etc., and topically use compound chloramphenicol rub, Bing Huang skin ointment, Halomethasone cream to relieve the symptoms, but it is still recommended to consult a specialist to develop a comprehensive treatment plan, and at present you should not use any wet wipes, bathing lotion and other chemical stimulation. You can wash with warm water.