Endometrial polyps are morphologically diagnosed as a result of endometrial hyperplasia formation, a confined endometrial swelling in the uterine cavity with a variable length of the tip, which may protrude outside the cervical opening in long cases. It can occur at any age. However, polypoid masses in the uterine cavity may be submucosal fibroids with tissues, endometrial polyps, adenomyoma-like polyps and malignant polyps (carcinoma or sarcoma). They can be diagnosed by hysteroscopy and surgically removed. The main symptoms are excessive menstruation, intermenstrual bleeding, bleeding before and after menstruation, irregular or postmenopausal bleeding or dripping menstruation. It may be accompanied by lower abdominal cramps, increased leucorrhea, and bleeding after sex. The formation of endometrial polyps is directly related to inflammation, endocrine disorders and local estrogen level of the endometrium is too high progesterone insensitive. The endometrium around the polyp is shed during menstruation, while the polyp is not shed. Transvaginal ultrasound suggests intrauterine light clusters or uneven endometrial echogenicity, substantial strong echogenic light clusters or filling defects in the uterine cavity, irregular endometrial lines, and filling defects in the HSG uterus. Hysteroscopy, endometrial scraping to obtain biopsy pathology for clear diagnosis. Uterine polyps due to 1) polyps filling the uterine cavity and preventing the survival and implantation of pregnant eggs. (2) Polyps combined with infection change the environment of the uterine cavity, which is not conducive to the survival of sperm and pregnant eggs. (3) Polyps prevent placental implantation and embryonic development and cause infertility. Polyps may become cancerous under the effect of long-term estrogen. Treatment After excluding malignant endometrial lesions, polyps can be treated by hysteroscopic surgical excision, which is minimally invasive and does not affect fertility and can preserve the uterus. Postoperative treatment: The recurrence rate of polyps is high, and prevention of recurrence is the key after surgery. The treatment is different for different ages and different requirements for fertility. Patients with fertility requirements can retreat from progesterone cycle and then conceive as soon as possible. Patients of childbearing age without fertility requirements can take short-acting contraceptives, or intrauterine placement of Mannitol (local release of progestin) to prevent recurrence. Postmenopausal women can undergo endometrial removal.