Contractions generally refers to the contraction of the smooth muscle of the uterine body when a pregnant woman enters labor, while paroxysm refers to the paroxysmal pain produced during the process of labor and delivery of the fetus and placenta. Contractions and paroxysms are normal physiological manifestations of pregnant women, but there are obvious differences in the formation of causes, performance characteristics and clinical significance. 1, the formation of causes: the formation of contractions is related to changes in the level of hormones in the body of the pregnant woman, while the formation of paroxysms comes from the uterine rhythmic contractions during labor and delivery, the cervix, pelvic floor, and the dilation of perineal tissues; 2, the performance of characteristics: contractions can be regular or irregular, while paroxysms are regular, and paroxysms are regular. The contractions can be regular or irregular, while the paroxysms are regular. Irregular contractions, also known as pseudocontractions, are uterine contractions that occur by chance and are not the regular contractions that occur during labor and delivery, and are often accompanied by abdominal stiffness, tightness, abdominal pain, or the absence of any pain, often occurring when the pregnant woman remains in a position of immobility for a long period of time. Paroxysm occurs only during regular contractions, and its characteristics are the same as regular contractions, with rhythmic, uterine symmetry and weakly enhanced polarity; 3. Clinical significance: the role of contractions in labor is crucial, only through effective contractions, the fetus can continue to descend along the birth canal to complete the delivery. The significance of the presence of paroxysms is a warning to the pregnant woman to enter the labor process. It should be noted that, pregnant women correctly recognize the performance of the labor process, can provide preparation for the later delivery, but also do not be overly nervous, fear, should overcome the fear, maintain a relaxed, happy, good attitude towards labor, which is conducive to the normal course of labor.