Generally, a hard tummy and mild abdominal pain at 38 weeks of pregnancy may be a false contraction or an aura of labor. If the hard belly and mild abdominal pain are accompanied by vaginal bleeding, it may be a manifestation of placental abruption. However, a hard stomach accompanied only by pain in the right lower abdomen may be a manifestation of intestinal diseases such as appendicitis. 1. Pseudocontractions: for example, when a pregnant woman is emotional, exercising or tired, it may cause pseudocontractions, that is, a hard stomach and mild abdominal pain, which can be recovered by resting for a period of time. 2. Labor aura: if the pseudocontractions do not recover well, then they become regular contractions with some intermittency, usually appearing Regular contractions, accompanied by the opening of the cervix and the disappearance of the cervical canal, indicate that labor is imminent and should be immediately hospitalized for delivery; 3, placental abruption: when placental abruption occurs, the placenta forms a hematoma after partial abruption from the uterine cavity, and the pregnant woman will also feel slight abdominal pain, and will be accompanied by a certain degree of contractions, manifested as a hard stomach. However, at this time, the pregnant woman will often have a small amount of vaginal bleeding, along with abdominal distention and decreased fetal movement. It is recommended to perform a 3D ultrasound of the fetus and to observe whether the placenta is thickened. Usually the pregnant woman does not have gestational hypertension disease and the placenta is not thickened by ultrasound, so placental abruption can be ruled out; 4. Intestinal diseases: pay attention to whether the pregnant woman has abnormal exhaustion or defecation, usually with digestive tract abnormalities, there may be intestinal related diseases. If abdominal pain occurs in the lower right abdomen, consider appendicitis. In an acute attack of appendicitis, inflammatory factors around the appendix irritate the peritoneum to produce mild abdominal pain, which also stimulates contractions and causes paroxysmal tummy hardening. In appendicitis abdominal pain, only the right lower abdominal pain is more pronounced in the whole abdomen. In contrast, the labor aura is more painful throughout the uterus and can be used as a differentiating criterion.