In case of vomiting in late pregnancy, take medical history. If the pregnant woman has been having pregnancy reactions throughout pregnancy and continues to late pregnancy, do not be overly nervous, as long as there is no water-electrolyte disorder in the examination and no ketone body in the urine routine, let the pregnant woman eat less and more meals, eat lightly, take oral vitamin B6 to stop vomiting and try to increase the intake of high quality protein food. If the vomiting is caused by gastroenteritis or indigestion, give medication to help digestion. In late pregnancy vomiting accompanied by fatigue, upper abdominal discomfort, jaundice and other symptoms must be alert to the occurrence of acute fatty liver during pregnancy, the onset of this disease is dangerous, the mother and child is very dangerous, should pay attention to the diagnosis and treatment as soon as possible.