To identify whether it is a contraction or not, the pregnant woman should lie down with her legs flexed and stroke the uterus with her hand. If the uterus feels hard similar to the feeling of the nose or forehead, it may be a contraction. If the contractions are intermittent, it may be a preterm abortion and requires timely examination at the hospital, ultrasound to observe the length of the cervix and the shape of the cervix. If the diagnosis of preterm abortion is confirmed, medication needs to be applied to preserve the pregnancy and be alert to uncommon complications, such as placental abruption. Other symptoms that cause abdominal pain may be acute gastroenteritis, urinary tract infection, urinary stones, etc., and need to see a professional doctor for differential diagnosis.