Drinking milk and wanting to vomit is mainly focused on two aspects of gastrointestinal diseases and lactose intolerance, such as suffering from gastroenteritis, stomach acid reflux and indigestion, which can cause nausea and vomiting. Especially if you drink milk on an empty stomach, it is easy to react with stomach acid, and the symptoms of nausea will be more obvious. In addition to digestive system lesions, people suffering from lactose intolerance lack digestive enzymes to break down lactose in the body after drinking milk, so they cannot break down the lactose in milk into glucose, and it will be easier to produce gas in the stomach and intestines, resulting in flatulence, vomiting and nausea. It is recommended that patients who experience nausea and vomiting after drinking milk can go to the hospital for a detailed examination in a timely manner, and specific treatment must be carried out under the guidance of a doctor based on the examination results.