Pain in the lower abdomen in women is usually caused by the onset of menstruation, pelvic inflammatory disease, etc. In addition, women of childbearing age do not exclude the possibility of pregnancy. If a woman has had unprotected sex recently and has a delayed menstrual period, she may be pregnant and may be tested with a urine test strip or see a hospital gynecologist for a blood HCG test. If pregnancy is ruled out, it may be a sign of impending menstruation, when the pelvic cavity is filled with blood and pain in the abdomen may occur. In addition, women with abdominal cramps are more likely to have pelvic inflammatory disease, and ultrasound and routine leucorrhea tests are recommended. In addition, it may also be caused by intestinal digestive disorders. If a woman has abdominal pain, it is recommended to consult a gynecologist for ultrasound examination, take rest, avoid spicy and stimulating food, and use anti-inflammatory and anti-infective drugs under the guidance of a doctor if necessary.