It is best not to use hot water on the stomach during pregnancy, using hot water on the stomach may have an impact on the fetus, the fetus in the first trimester of pregnancy is in the most important period of growth and development, if often exposed to high temperature may lead to developmental malformations of the fetus, and in serious cases may directly lead to miscarriage. Women with uterine cold can properly drink warm water or brown sugar water, but it is not recommended to cover the belly with a hot water bag, this practice is more dangerous. The belly should not be too cold or too hot, the fetus is very fragile, the external heat stimulation and various other factors will have an impact on the fetus, will stimulate the uterus contraction, thus affecting the normal growth and development of the fetus. Normally, you should pay attention to keep your body warm, eat more nutritious food, and preferably do not catch a cold or catch a chill.