The main reasons for vomiting in mid-pregnancy are the following: i. severe pregnancy vomiting, which occurs not only in early pregnancy but may even continue into late pregnancy, due to the imbalance of hormones in the body during pregnancy, sensitive patients will experience more violent vomiting; ii. mental stress, symptoms of anxiety and depression accompanied by neurological vomiting, which is mainly regulated by the intestine-brain axis and caused by mental factors; iii. brain diseases and Vomiting caused by brain diseases, such as brain tumor or other causes of brain pressure, increased intracranial pressure caused by vomiting in the form of jets; IV, caused by dietary factors, excessive diet, eating too much food, indigestion easily lead to vomiting; V, gastrointestinal diseases, such as bile reflux gastritis.