The contractions at 31 weeks of pregnancy may be pseudo contractions, which are usually normal, but may also be caused by preterm labor, such as frequent contractions, need to go to the hospital to check whether there are signs of preterm labor, early intervention. 1, pseudo contractions: the sensitivity of the uterine muscles increases in late pregnancy, if irregular uterine contractions occur after prolonged standing or walking, such as occasional uterine contractions, not accompanied by lumbar acidity, lower abdominal cramping, and no pain, vaginal discharge changes, only abdominal hardness. And there is no pain, change of vaginal discharge, etc., but only hardening of the abdomen, it can be considered as pseudocontraction, which is generally normal. Pregnant women need to pay attention to bed rest, discomfort symptoms can be gradually relieved; 2, preterm labor: if pregnant women find that the uterine contractions are particularly frequent and show a certain degree of regularity, and accompanied by lumbago, lower abdominal cramps, vaginal discharge, a small amount of vaginal bleeding and other symptoms, need to consider the possible preterm labor, is not normal. You should go to the hospital in time to apply magnesium sulfate or nifedipine to suppress contractions and apply glucocorticoids to promote lung maturation, so as to achieve the purpose of fetal preservation. During pregnancy, you should pay attention to rest and avoid overexertion or strenuous exercise, you can do pregnancy yoga, walking and other moderate exercises. Ensure emotional stability, as well as a reasonable diet with balanced nutrition to ensure normal fetal development.