The rectum is a part of the digestive tract that completes the process of digestion of food, its structure is adapted for the act of defecation. Pain in the anus can be caused by various factors. Usually, people are embarrassed by such symptoms and consult a doctor when the disorders are severely exacerbated. 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.