Anal dampness with a foul smell of stool can be caused by a variety of anal diseases. If the patient has perianal inflammation and skin rashes, papules, urticaria patients with rashes often rupture over time and form ulcers, which can cause fecal exudation, give symptomatic treatment such as paregoric pine and keeping the perineum clean, warm saline or potassium permanganate sitz baths. If the patient’s anus is moist with foul smelling stools, it can also be caused by anal diseases such as hemorrhoids. If it is an anal disease, it is recommended that the patient go to the local anorectal department for consultation, and the seriousness of the condition can choose surgical treatment.