Women with pain in the left side of the abdomen, there may be the following reasons: 1, must be considered is a woman’s gynecological diseases, such as acute or chronic pelvic inflammatory disease, dysmenorrhea or endometriosis, as well as uterine adnexal diseases, such as ovarian cysts, torsion of the tip or the luteal rupture of the ovary, etc, will appear in the left side of the small abdominal pain. 2, it may be a disease of the urinary system, such as urinary tract stones or Urinary tract infection, urinary tract stones in addition to the left abdomen pain, there will be pain in the renal region or renal region percussion pain. And urinary tract infection in addition to the pain in the left abdomen, will also cause frequent urination, urinary urgency, urinary pain and other symptoms. 3, may be gastrointestinal diseases, such as acute chronic gastroenteritis, gastrointestinal dysfunction or intestinal spasm.