Wanting to vomit for no reason may be caused by early pregnancy reaction, may also be caused by gastrointestinal diseases, and may also be caused by diabetic ketoacidosis. 1. Early pregnancy reaction: Early pregnancy reaction can lead to symptoms of vomiting for no reason, which is a normal phenomenon, the patient may also appear chills, dizziness, fatigue, drowsiness, like to eat acid, aversion to grease and other symptoms. 2. Gastrointestinal diseases: if the patient suffers from chronic gastritis, gastroesophageal reflux, acute gastroenteritis and other diseases, there will be symptoms of vomiting for no apparent reason, in addition, the patient can also appear epigastric discomfort, acid reflux, heartburn, abdominal pain, diarrhea and other symptoms. 3. Diabetic ketoacidosis: diabetic ketoacidosis can also lead to symptoms of vomiting for no reason, in addition to the patient can also appear to drink, urinate, fatigue, exhale rotten apple flavor and other symptoms. Excluding physiological factors, if the patient’s symptoms continue to vomit for no reason, it is recommended to consult a doctor in time to identify the cause and ask the doctor to deal with it.