Placenta praevia is a condition of late gestation after 28 weeks of gestation in which the placenta is positioned below the fetal previa and attached to the lower uterine segment, with the lower edge of the placenta reaching or covering the internal cervical os. Placenta praevia itself does not cause contractions, but bleeding from placenta praevia can induce contractions, which in turn can cause bleeding. Since the early stages of pregnancy, the uterus can have irregular contractions, which are physiological painless contractions. You need to observe whether the contractions feel painful, whether they are regular, and whether they induce vaginal bleeding, if there is no discomfort, you can continue to observe, if there are regular contractions and vaginal bleeding, you need to be hospitalized for observation and treatment.