Abdominal pain at 38 weeks may be caused by labor, placental abruption, acute gastroenteritis and other reasons. 1. Prolonged labor: 38 weeks of pregnancy has been full-term, can be ready for delivery at any time, in labor before the start of irregular abdominal pain, redness and other symptoms of the aura of labor, and will gradually develop into a regular abdominal pain, the examination of the uterine opening, and cervical recession, need to be hospitalized in the hospital to wait for the birth of the baby. 2. Placental abruption: it can be manifested as lower abdominal pain, accompanied by vaginal bleeding, increased uterine tension, accompanied by uterine pressure, in severe cases, the uterus is in the shape of a plate, the fetal heart rate slows down or disappears, combined with the clinical manifestations and ultrasound can be a clear diagnosis. 3. Acute gastroenteritis: the symptoms of abdominal pain can also occur, can also be accompanied by nausea, vomiting, diarrhea and other symptoms, often with a history of unclean or improper diet, combined with the history and clinical manifestations can be diagnosed. When abdominal pain in the 38th week of pregnancy, you need to go to the hospital in time to identify the cause and actively deal with it.