In patients with gestational diabetes who experience thirst, the way to relieve it is often to use insulin, because thirst, as a very characteristic symptom of diabetes, often indicates that blood glucose is significantly high and that high blood glucose creates high osmotic pressure to cause thirst. Gestational diabetic patients who are still thirsty despite lifestyle interventions, that is, well-controlled diet and exercise, suggest that blood glucose is not up to standard. For gestational diabetic patients, the only option for medication at present is insulin, and all oral hypoglycemic drugs, gestational diabetic patients are not able to use, whether it is metformin or acarbose, etc. Therefore, the use of insulin is a very important measure for gestational diabetes patients to relieve their thirst. The insulin program is often chosen from human insulin instead of insulin analogues, in order to minimize the side effects brought about by insulin analogues, which are specific to the fetus as well as the pregnant woman herself, and only the reasonable use of human insulin can relieve the symptoms of thirst in pregnant women.