The pain in the abdomen at 33 weeks of pregnancy, like a period, can be considered as pseudo contractions and preterm labor. Pregnant women can observe whether the phenomenon is accompanied by vaginal bleeding, and go to the hospital in time to confirm the diagnosis to clarify the cause and ensure the safety of the fetus. Common causes and treatments 1, pseudo contractions: pseudo contractions can occur in the second trimester of pregnancy, manifesting as tightening, hardening and swelling of the stomach, which can be caused by irregular contractions of the uterus, with a short duration and a long interval, and the pain symptoms are mild and usually not accompanied by vaginal bleeding. If a pregnant woman has such a condition, no special treatment is needed, but she should pay attention to rest, avoid straining, and regularly count fetal movements; 2. Premature labor: frequent contractions often occur, manifested by a high frequency of abdominal tightness, hardness, longer duration, more intense abdominal pain, and will gradually increase, most cases will be accompanied by vaginal bleeding. In this case, the pregnant woman should go to the hospital for a clear diagnosis, and if it is a sign of preterm labor, she should use drugs to suppress the contractions under the guidance of a professional doctor. However, pregnant women should have regular checkups to monitor the growth and development of the fetus and seek medical attention if abnormalities occur. In daily life, pregnant women need to exercise properly, prohibit sexual intercourse, and enhance nutrition, including protein and trace elements such as calcium and iron, and reduce the intake of high sugar and high fat foods, such as cream and doughnuts.