The common causes of left lower abdominal pain after the seventh month of pregnancy are considered from the following aspects. The first is the presence of injury and acute inflammation of the skin of the lower left abdomen. The second is the internal organs commonly the sigmoid colon, the presence of stool retention in the intestine, and the absence of recent constipation and poor bowel movements. After the seventh month of pregnancy, the enlarged uterus may squeeze the sigmoid colon and cause poor defecation. Finally, consider the presence of stones in the ureter, which are often accompanied by hematuria and radiating pain in the back. For pain in the lower left side of the stomach in the seventh month of pregnancy, it is recommended to go to the local hospital for an ultrasound examination to further clarify the diagnosis.