Uterine polyp is a common gynecological disease, in clinical practice, usually refers to endometrial polyps, mainly by the endometrium proliferation and protruding from the endometrial surface of the benign lesions. They occur in women of childbearing age and menopause. At present, the cause of uterine polyps is still unclear. 1, inflammatory stimulation: uterine polyps are mostly due to long-term inflammatory stimulation of the endometrium, such as chronic endometritis, endometriosis and other related. Long-term inflammatory stimulation can lead to abnormal proliferation of the endometrium, forming polyps. 2, and estrogen, progesterone-related: when the female endocrine abnormalities, such as the lack of progesterone or estrogen levels or high levels of both conditions at the same time, the endometrium in a single estrogen stimulation, and no progesterone and its resistance to the state of the uterine polyps; local estrogen receptor and (or) progesterone receptor expression disorders, the endometrium of the hormone response to the dysfunction can also cause uterine polyps. 3, genetic factors: some studies have proved that the occurrence of uterine polyps and genetic factors such as gene mutation also have a certain relationship. 4, high-risk factors: in addition to the above factors, there are the following high-risk factors of women susceptible to uterine polyps, such as age factors, obesity, late menopause, diabetes, hypertension, tamoxifen treatment. To summarize, the etiology of uterine polyps is related to chronic inflammatory stimulation, estrogen and progesterone levels, genetic factors, etc. It is recommended that patients with high-risk factors, such as the presence of irregular vaginal bleeding and other cleanup, timely consultation.