If there is hardness in the stomach in late pregnancy but no pain, it is generally considered to be a physiological phenomenon like pseudocontraction, but some pathological possibilities cannot be ruled out. It is necessary to determine the cause according to the specific situation and examination results, and if there is any abnormality, seek medical treatment in time. Physiological phenomenon: Pseudo contractions are a common physiological phenomenon in late pregnancy caused by irregular uterine contractions, which are not harmful to the fetus and pregnant women. In late pregnancy, due to the change of hormone level in the body, the uterine contraction receptors increase, resulting in the uterus’ increased sensitivity to various stimuli. If a pregnant woman stands, walks, sits for a long time or has emotional changes or mental tension, it may induce uterine contractions and cause the performance of a hard stomach. If a pregnant woman feels that her stomach is hard for a long time, she needs to improve the examination in time to make a clear diagnosis and exclude factors such as preterm labor, placenta abruptio and placenta praevia. 1. Preterm labor: refers to the delivery at the end of pregnancy full 37 weeks. Usually the mother can find contractions, which are manifested as tightness, hardness and abdominal pain in the lower abdomen. If there are 2-3 contractions in every 10 minutes, lasting for more than 30 seconds or accompanied by vaginal bloody discharge, it is considered preterm labor and needs to go to hospital for examination and observation. If there is progressive dilatation of the cervical opening during observation and the opening of the uterus is greater than 2 cm, preterm labor will be inevitable. 2. placental abruption: placental abruption is a serious complication in late pregnancy, early on it may appear as a hard but not painful belly, with vaginal bleeding, the bleeding is usually more, as the condition progresses, if not treated in time, it can endanger the life of mother and child. The treatment principle is early identification, correction of shock, timely termination of pregnancy and prevention of complications. 3. Placenta praevia: the clinical manifestation is painless vaginal bleeding without abdominal pain, and there may be a hard belly. At this time, it is recommended to do ultrasound examination to understand the position of placenta to exclude placenta praevia. The pregnant woman should rest in bed and if necessary, she may need to be treated with drugs to stop the contractions and bleeding. Pregnant women do not need to worry too much, but should go to the hospital promptly when they have a hard but not painful tummy, so that the cause can be clarified and treated accordingly under the guidance of the doctor. Secondly, pregnant women should pay attention to proper rest and count fetal movements at home, and at the same time, they should have regular maternity checkups to observe the growth and development of the fetus.