The pain and swelling in the abdomen is commonly caused by gram-negative bacillus infections, more commonly E. coli, so it is usually necessary to take second or third generation cephalosporins, such as cefixime, etc., and also quinolone antibiotics, such as levofloxacin or ciprofloxacin. However, when there is distension and pain in the abdomen, it is advisable to go to the hospital for examination to further clarify the cause of the pain, whether it is caused by appendicitis, chronic pelvic inflammatory disease, or even pain caused by tubal inflammation. If the pain is caused by appendicitis, ultrasound examination of the appendix and routine blood tests are usually recommended, and laparoscopic appendectomy will be considered after the diagnosis is clear. If the pain is caused by chronic pelvic inflammatory disease or tubal inflammatory disease, intravenous antibiotics are usually recommended. After treatment, pelvic ultrasound should be repeated to find out whether there is fluid in the pelvic cavity.