In the early stages of pregnancy, the estrogen in the body changes greatly and increases thousands of times. The mucous membrane of the gastrointestinal tract becomes mildly edematous under the effect of estrogen, so there is no appetite, no desire to eat, and some people even experience nausea and vomiting. In severe cases, because of nausea and vomiting, it can also lead to electrolyte disorders in the body, which need to be treated with sedative rehydration medication to correct the electrolyte disorders. Therefore, this is the reason for the lack of appetite in early pregnancy. It is recommended to ask yourself to eat less each time even if you can’t eat, and to eat easily digestible food to avoid the friction of the gastric mucosa in the fasting state and aggravate the clinical nausea, vomiting and anorexia. In addition, if you have severe nausea and vomiting in early pregnancy, you should have an ultrasound examination to rule out the possibility of hyperemesis gravidarum.