Nausea after pregnancy is mainly caused by changes in hormone levels in the body. After pregnancy, there is an increase in estrogen and progesterone, which can lead to nausea, vomiting, acid reflux, loss of appetite, and anorexia. Taste changes may also occur during this period, and what you were willing to eat before pregnancy may cause nausea when you see it after pregnancy. It is possible that the things that you did not want to eat before pregnancy may suddenly become very popular after pregnancy, which is a normal manifestation of pregnancy reaction. During the period, try to pay attention to a light diet, do not eat too greasy food, to avoid aggravating the burden on the stomach, leading to increased nausea symptoms. You can eat more grapes, oranges, grapefruit, apples and other acidic foods in moderation, which can easily increase appetite and can also supplement vitamins.