Contractions generally refer to the contraction of the smooth muscle of the body of the uterus when the pregnant woman enters into labor, while paroxysmal pain refers to the paroxysmal pain that occurs when the pregnant woman enters into labor and delivery of the fetus and placenta. Both contractions and paroxysmal pain are normal physiological manifestations of pregnant women, but there are obvious differences in the formation causes, performance characteristics and clinical significance. 1. formation causes: the formation of contractions is related to the changes of hormone levels in pregnant women, while the formation of paroxysmal pain comes from the rhythmic contraction of the uterus during labor and delivery and the dilatation of the cervical, pelvic floor and perineal tissues; 2. performance characteristics: contractions can be regular or irregular, while paroxysmal pain is irregular. The contractions can be regular or irregular, while the pain is regular. Irregular contractions, also known as pseudo contractions, are occasional uterine contractions, not the regular contractions that occur during labor, often accompanied by abdominal hardness, tightness, abdominal pain, or no pain, and often occur when the pregnant woman remains in a fixed position for a long time. The paroxysm occurs only during the regular contraction period and is characterized by the same rhythm, uterine symmetry and weakly enhanced polarity as the regular contraction; 3. Clinical significance: the role of contractions in labor is crucial, and only through effective contractions can the fetus continuously descend along the birth canal to complete labor. The significance of the presence of contractions is a warning to the pregnant woman to enter into labor and delivery. It is worth noting that the correct understanding of the performance of pregnant women in the process of labor can provide preparation for later delivery, but also do not be overly nervous, fear, should overcome the fear of psychology, maintain a relaxed and happy, good attitude towards childbirth, which is conducive to the normal conduct of childbirth.