Stomach pain three or four days after endometrial polyp surgery may be caused by normal phenomenon, infection, or other factors such as improper diet and overwork. 1. Normal phenomenon: after endometrial polyp surgery, three or four days after the symptoms of stomach pain, if the pain is not serious vaginal bleeding is not much, it is considered a normal performance. If the pain is not severe and there is not much vaginal bleeding, it is considered to be normal. Because the endometrium does not recover particularly fast, slight pain in the abdomen for three or four days after the operation is considered to be normal, and it is recommended that the abdominal pain and vaginal secretions be closely observed to see if there is any abnormality. 2. Infection: It is recommended to strengthen the postoperative care and pay attention to personal hygiene. Poor hygiene of the vulva or improper surgical operation may lead to pathogenic bacterial infection, cervical or pelvic inflammation, which may lead to abdominal pain, increased vaginal discharge or discharge odor, etc. It is recommended to go to the gynecology department of the hospital for an examination, and take care of it as soon as possible in order to avoid the spread of inflammation. 3. Other factors: after endometrial polyp surgery, it is recommended to pay attention to rest and dietary regimen to increase the body’s immunity, which can promote recovery. If you don’t pay attention to rest, too much fatigue, lack of sleep and cold abdomen may lead to stomach pain. There may also be other reasons for stomach pain three or four days after endometrial polyp surgery. It is recommended to consult a doctor at any time if the abdominal pain cannot be relieved or worsens, pay attention to daily care, strengthen hygiene care and avoid infections.