The itching of the anus after a bowel movement is mostly considered to be caused by the presence of anal eczema, or anal pruritus, due to the discomfort caused by the irritation of the skin of the anal area by the bowel movement. If it is caused by anal eczema, you can choose topical application of furnace glycolic lotion with mometasone furoate cream, while the patient should pay attention to the local dry skin hygiene. The actual food should be light, spicy and stimulating food should not be eaten as much as possible, and it is generally recommended to wash the skin of the perianal area with warm salt water after defecation. If you’ve got an itchy anus, you can choose to apply hydrocortisone cream topically, don’t scald the skin with too hot water, eat some paracetamol, reserpine and other drugs for antihistamine treatment, and apply with furnace glycerine lotion, and pay attention to the diet.