Pregnant women with sweet mouth are not necessarily diabetic, the diagnostic criteria for diabetes in pregnant women are fasting blood sugar greater than or equal to 5.1mmol/L; two hours after meal blood sugar greater than or equal to 8.5mmol/L; one hour after meal blood sugar greater than or equal to 10.0mmol/L. The causes of sweet mouth in pregnant women are: 1. 2, pregnant women with diabetes have dry mouth, sweet mouth, drinking and other symptoms, need to monitor blood sugar, control diet, insulin injections and other comprehensive therapy, so that blood sugar control within the normal range, otherwise it affects the healthy development of the fetus. Pregnant women with sweet mouth need to identify the causes and treat the symptoms.