A bout of pain and hardness in the stomach at 28 weeks may be normal, but it does not exclude pathological factors such as preterm labor, fetal distress and other conditions, which can be treated by rest, medication, termination of pregnancy and other methods. 1. Normal: 28 weeks of pregnancy belongs to the mid-pregnancy, there may be false contractions, pregnant women will feel a burst of pain and hardness of the stomach, this situation belongs to the physiological manifestations of pregnancy. This is a physiological manifestation of pregnancy. The symptoms will gradually disappear after adequate rest. 2. Preterm labor: at 28 weeks of pregnancy, if the premature rupture of membranes occurs, the pregnant woman will also experience a burst of pain and hardness of the stomach, at this time, the pregnant woman has a dilatation of the mouth of the uterus. At this time, you should consult a doctor as soon as possible, and follow the doctor’s instructions to use magnesium sulfate, ritodrine and other anti-fetal treatment. 3. Fetal distress: if there is intrauterine infection, umbilical cord entanglement, etc., can lead to fetal hypoxia, frequent fetal movement or fetal movement is weakened, the pregnant woman is prone to a bout of pain in the stomach and hardness of the stomach. At this time, the pregnant woman should promptly seek medical attention, fetal heart monitoring, and take the left side of the lying position, oxygen and other symptomatic treatment, if the symptoms can not be relieved, if necessary, can terminate the pregnancy. If a pregnant woman has a pain in the stomach at 28 weeks, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.