Summary: Symptoms such as nausea and vomiting, greasiness, easy fullness, acidity, spicy taste, drowsiness, and constipation may occur in early pregnancy. These are normal physiological reactions after pregnancy. These early pregnancy reactions are caused by changes in hormones and nerves produced by the body after pregnancy. The reflux of food in the stomach reduces the tone of the smooth muscles of the gastrointestinal tract, causing morning sickness. In the early stages of pregnancy, symptoms such as nausea and vomiting, greasiness, easy fullness, liking for hot and sour foods, drowsiness, and constipation are all normal physiological reactions after pregnancy. These early pregnancy reactions are caused by changes in hormones and nerves secreted by the body after pregnancy.