The time for postpartum high blood glucose to return to normal varies from person to person, and most gestational diabetes patients’ postpartum blood glucose can gradually return to normal within 6-12 weeks. Postpartum high blood sugar can be divided into two cases, one is diagnosed with diabetes before pregnancy, called diabetes with pregnancy; one is found during pregnancy glucose tolerance abnormalities caused by varying degrees of hyperglycemia, when hyperglycemia reaches a certain standard that is called gestational diabetes mellitus. Gestational diabetes mellitus patients can return to normal within 6-12 weeks after delivery with reasonable dietary control and proper exercise. If the blood glucose value is too high during this period, medication can be used to control the blood glucose under the guidance of a professional doctor. Diabetes combined with pregnancy is still the state of diabetes after delivery, need to be controlled and treated. In short, high blood sugar after delivery should pay attention to dietary control, eat less sugary food, appropriate exercise, regular work and rest, no smoking and alcohol and so on.