Rectal polyps refer to bulging lesions that protrude from the rectal mucosa into the intestinal lumen. The size of rectal polyps varies from a few millimeters, like small grains of rice, to as large as 3-4 cm in diameter, which can even block the intestine and cause intestinal obstruction. Polyps can be solitary, more commonly multiple, and in some rare cases, polyps can be in the thousands. Some polyps have tips of varying length at the root, where they are attached to the mucosa, called tipped polyps, or polyps that grow diffusely, called flat polyps, or tangle-free polyps. Although the causes of polyps are very complex, the majority of rectal polyps are benign lesions that are not life-threatening, and only some of them have a tendency to become cancerous and require active treatment. The term “polyp” is a clinical diagnosis and is collectively referred to as “polyps” before the pathology is clarified. Polyp classification is mainly based on the pathological type, mainly divided into adenomatous polyps, inflammatory polyps, hyperplastic polyps, misshapen polyps, etc. There are also some intestinal tumors other than adenomas, such as carcinoid tumors, lymphomas can also be manifested as polyps, and adenomatous polyps are the most common and most prone to malignant transformation. Adenomas are divided into tubular adenomas, villous adenomas and mixed adenomas according to their pathological types.