Tugging pain on the left side of the stomach in late pregnancy is usually a common manifestation and is usually nothing to worry about as long as there are no other abnormalities. In a few cases, it is related to some diseases, such as gynecological inflammation, ovarian cyst torsion, urinary stones, etc., which can be treated by early consultation. I. Physiological causes 1. Uterus rotation and pulling: as the gestational age increases in late pregnancy, the fetus continues to develop and grow, and the uterus becomes larger and larger; because there is a sigmoid colon on the left side of the pelvis, and the position is relatively fixed, the ligament is fixed and not easily displaced, so the enlarged uterus will rotate to the right, resulting in pulling pain on the left side; 2. Contractions: stimulating the uterus in the process of fetal movement causes irregular uterine contractions, which may also The pulling pain on the left side of the abdomen may also occur. Physiological pain does not require treatment, pregnant women pay attention to rest in bed as much as possible, do not carry out physical labor and sports, relax, etc., generally can be significantly relieved. Pathological factors 1, inflammatory diseases: If you have gynecological diseases such as adnexitis and tubitis on the left side, you may experience painful tugging in the stomach, which can be diagnosed through ultrasound examination, and you need to strictly follow the medical advice to use anti-inflammatory drugs, such as cephalosporin antibiotics; 2, ovarian cyst reversal: If the pregnant woman previously suffered from ovarian cysts, you need to be alert to ovarian cyst reversal when there is painful tugging in the abdomen. The attack of the disease may be related to the environment, diet, infection, hormones and other factors, and can be due to a single factor or to a combination of factors. If the cyst persists or increases in size, risks of malignancy or rupture or torsion, surgery is required. 3. Urinary stones: If the left side of the stomach is accompanied by left-sided back pain, it may be due to urinary stones, which need to be diagnosed by ultrasound, X-ray, CT, etc. If the stones are not serious, stone removal treatment can be performed after delivery.