Anal swelling and sweating, may be hemorrhoids, rectal prolapse, enteritis and other causes. 1. Hemorrhoids: hemorrhoids hemorrhoidal core is relatively large out of the anus caused by anal swelling, because the anus is not closed tightly, intestinal fluid outflow, feel like sweating. 2. Rectal prolapse: the mucous membrane of the rectum and the muscle layer are separated and detached from the anus, resulting in anal swelling, anal closure is not tight, intestinal fluids flow out of the feeling of anal moisture, sweating. 3. Enteritis: the intestinal tract is stimulated by inflammatory factors, which causes anal swelling, incomplete discharge, transient anal incontinence, anal moisture and sweating. Besides, anal canal cancer, rectal cancer, anal papilloma and so on can also appear the above symptoms, it is recommended to consult doctor in time, do systematic examination, find out the cause of the disease, and treat it as early as possible so as to avoid delaying the condition.