Wanting to vomit after drinking coffee may be related to unaccustomed to the taste of coffee, caffeine sensitivity, and combined digestive disorders. 1. If you don’t like the taste of coffee, once you drink coffee, it may cause vomiting. 2. Caffeine contained in coffee can stimulate the nerves of the brain, and people who are sensitive to caffeine may feel like vomiting after drinking coffee. 3. If you suffer from gastrointestinal diseases such as reflux esophagitis, drinking coffee can stimulate the gastric mucosa, which may aggravate your condition and cause acid reflux and vomiting. It is recommended that people who feel like vomiting after drinking coffee should consult a doctor in time if they have other discomforts, so as to clarify the cause.