Most people with gestational diabetes have their blood sugar return to normal at the end of their pregnancy, but a few develop lifelong diabetes. Gestational diabetes is diabetes that occurs after pregnancy when the pregnant woman did not have diabetes before the pregnancy. This is mainly related to the body’s increased demand for sugar and the increase in blood sugar-raising hormones after pregnancy, as well as factors such as weight gain and insulin resistance during pregnancy. Gestational diabetes mellitus patients mainly focus on diet control, eat less high-sugar foods, and have appropriate exercise every day. Oral hypoglycemic drugs are usually not advocated as they may affect the fetus. If necessary, insulin injections can be given to lower blood sugar. Most patients’ blood sugar can return to normal at the end of pregnancy, but a few develop lifelong diabetes. Patients with gestational diabetes need to consult a professional doctor to choose a suitable glucose-lowering program, and should not use drugs on their own.