The causes of wanting to vomit after drinking some wine include alcohol allergy, chronic gastritis, liver injury and so on. 1. Alcohol allergy: If the patient belongs to the allergic body and is allergic to alcohol, even if he drinks a little bit of wine, the ethanol in the wine will cause the body to have a perverse reaction. The cells and mucous membranes of the body will become edematous, and the blood vessels on the gastric mucous membrane will dilate, resulting in vomiting. 2. Chronic gastritis: The gastric mucosa of patients with chronic gastritis is in a state of damage, and the barrier ability is reduced. Alcohol in wine will stimulate the damaged gastric mucosa, leading to gastrointestinal dysfunction and vomiting. 3. Liver damage: If the patient’s liver cells are damaged, resulting in liver dysfunction, even a little bit of alcohol will cause vomiting, abdominal distension and other uncomfortable symptoms. There are many other reasons why patients want to vomit after drinking a little bit of alcohol. It is recommended that patients stop drinking alcohol if accompanied by vomiting, burning sensation in the stomach and other uncomfortable symptoms, it is recommended that they go to the hospital for medical treatment.