There is a certain probability that very small, solitary or multiple endometrial polyps can be expelled after taking progesterone, but larger polyps can only be removed surgically. Endometrial polyps are mainly caused by local hyperplasia of the endometrium, mostly related to changes in hormone levels in the body. Patients taking progesterone can produce a drug scraping effect, which stimulates necrosis and exfoliation of the endometrium during the secretory phase, manifesting as vaginal bleeding, and small polyps can be discharged, which are generally visible only to the naked eye, with increased blood volume and the presence of blood clots, similar in color to menstrual bleeding or slightly darker. The discharged polyps need to be taken for pathological examination to rule out the possibility of lesions and a repeat vaginal ultrasound is needed to make sure that the polyps are completely gone and that the treatment is effective. When there are still polyps left or the polyps are too large to be discharged with progesterone, surgical removal may be an appropriate option. After the polyps are expelled, take care to rest in bed, eat a light diet, avoid spicy and stimulating food, do not exercise strenuously, observe closely for heavy vaginal bleeding and abdominal pain, and inform the doctor in time if abnormalities are found.