The anus is that part of the intestinal tract that passes through the muscular canal of the pelvis and anal sphincters. It is the final orifice through which stool passes out of the body. In adults, ...

The most common cause of an anal fistula is an anal abscess, although there are several other possible causes of the condition. Most anal fistulas form in the posterior midline. An abscess is a ...

The American Society of Colon and Rectal Surgeons has issued updated guidelines for physicians, published in Diseases of the Colon & Rectum, about how to treat problems of the anus and rectum called ...

Anal fissures cause sharp pain and bright red bleeding during and after bowel movements Piles involve swollen veins causing bleeding, itching, lumps, and sometimes pain if clotted Anal abscesses are ...

Medically reviewed by Robert Burakoff, MD Key Takeaways Mucus in stool can be a sign of a health issue like irritable bowel syndrome (IBS). Ulcerative colitis can cause mucus in the stool due to ...

Factors involved in fistulizing perianal disease pathogenesis include a genetically determined altered immune response with increased production of cytokines, leading to upregulation of matrix ...

Medically reviewed by William Truswell, MDKey TakeawaysHemorrhoids cause burning anal pain, itching, and blood in stool.Spicy foods, coffee, and alcohol can irritate the anal area and cause ...