The tightness of the stomach in the fifth month of pregnancy is mostly caused by pseudo contractions, which are irregular contractions that last for a short period of time and do not lead to early delivery, and generally have no effect on the development of the fetus. If a pregnant woman has too frequent false contractions, it may affect the normal development of the fetus, and she should go to the hospital for consultation and treatment. A pregnant woman should not be overly nervous when she experiences tightness in mid-pregnancy, and she should lie down and rest immediately, which may be due to over-exertion. If a pregnant woman has a tight stomach, accompanied by abdominal pain or symptoms of redness, it may be the precursor of miscarriage, and should be sent to the hospital immediately for treatment. Pregnant women in mid-pregnancy false contractions should lie down and rest, or change positions to relieve, pregnant women 5 months pregnant need to supplement protein and calcium to promote fetal development.