Drinking coffee can cause irritation to the stomach. Many people usually have the habit of drinking coffee, coffee is also beneficial to the human body, coffee contains caffeine, after taking can stimulate the nerve, heart, respiratory system, appropriate to take coffee can play a refreshing, reduce fatigue role. People with bad stomachs should try to avoid drinking coffee, if the body ingests more caffeine will cause stimulation of the stomach, which causes the gastric sinus to secrete more gastric acid, which can cause damage to the gastric mucosa causing indigestion, resulting in a burning sensation in the stomach, acid reflux, pain. When the body has gastritis, gastric ulcer and other chronic diseases, often drinking coffee will lead to esophageal reflux, belching, vomiting symptoms worsen, patients with gastric disease should pay attention to regular diet, avoid overeating, you can take food to nourish the stomach, such as millet porridge.