High fasting blood glucose in the morning after pregnant women control sugar may be caused by factors such as Sumujie phenomenon, dawn phenomenon, and other factors, it is recommended to consult a timely medical care. 1. Sumujie phenomenon: it refers to the phenomenon of nighttime hypoglycemia when diabetic patients use too large a dose of insulin, and the body, in order to protect itself through the negative feedback regulation mechanism, makes the patient’s blood glucose rise early in the morning, which leads to the rise of fasting blood glucose. 2. Dawn phenomenon: diabetic patients have stable blood glucose control at night, i.e. no hypoglycemia, but at dawn the imbalance between the secretion of various hormones leads to an increase in blood glucose in the early morning, resulting in high fasting blood glucose. Pregnant women with elevated fasting blood glucose after glycemic control are advised to go to the hospital and ask the doctor to make a judgment.