There are four main possibilities for anal dysuria: first, hemorrhoids, a common type of perirectal disease, with typical clinical manifestations of post-poo anal dripping blood and a sense of incomplete defecation. Second, perianal abscess, an acute purulent infection around the rectum and anus, when the infection spreads to the rectal wall, there can be shortness of breath and a feeling of anal swelling. Third, anal sinusitis, a purulent infection of the anal fossa, the clinical manifestations are severe anal pain, and pus and fluid flow can be accompanied by shortness of breath. Fourth, rectal prolapse, a partial or complete prolapse of the rectal mucosa, the clinical manifestations of the anal swelling prolapse, accompanied by a sense of incomplete defecation. Fifth, rectal malignant tumor, there is often no obvious clinical manifestations in the early stage, when the disease progresses to the advanced stage, diarrhea and blood in the stool may appear, accompanied by body wasting and other systemic symptoms. When there is an anal urge to defecate, you should go to a regular hospital for anorectal surgery or general surgery in time to clarify the cause and achieve early detection and treatment of the disease.