The rectum is part of the digestive tract, which completes the process of digesting food, its structure is adapted for the act of defecation. Pain in the anus can be caused by various factors. Usually, people feel embarrassed by such symptoms and go to the doctor with a sharp exacerbation of the disorders. This is fundamentally wrong, since pain can signal serious problems, early diagnosis and treatment will help to avoid their aggravation. The main causes of pain are physical disorders, oncological diseases and inflammatory diseases.