Drinking coffee and wanting to vomit is related to drinking coffee on an empty stomach, and some people are caused by their own stomach disorders. Coffee is one of the more common drinks in life, which also has a large amount of caffeine, which can help refresh the brain, but also has a stimulating nature. When drinking coffee should be avoided in the fasting state, drinking coffee on an empty stomach, caffeine will be directly stimulated by the mucosa causing stomach cramps and contractions, so vomiting will occur. Some people suffer from gastritis, gastric ulcer, duodenal ulcer in the digestive system itself, which will not only affect the function of the stomach, but also lead to damage to the protective mucosal barrier of the stomach wall. People with diseases on the mucous membrane of the stomach will directly stimulate the stomach wall when eating irritating foods, which can easily lead to nausea and vomiting. It is best to avoid drinking coffee if you have a stomach disorder, and to use medication to treat the disorder.