Patients with bad stomachs are advised not to drink black tea and coffee because black tea and coffee contain caffeine, tea polyphenols and other ingredients that will stimulate the gastric mucosa. People with a weak stomach should avoid eating foods that stimulate the stomach, black tea and coffee contain tea polyphenols, caffeine and other ingredients, which will stimulate the gastric mucosa, affecting the normal operation of the digestive function of the stomach. If you drink for a long time, it will seriously affect the quality of sleep, so it is recommended that people with a weak stomach do not drink black tea and coffee. People with poor stomach should pay attention to a light diet, balanced and comprehensive in daily life, eat more easily digestible food, try to avoid spicy stimulation (such as chili peppers, etc.), too hot and too cold food, to do small meals, chewing and swallowing slowly. Patients with stomach discomfort are advised to seek timely medical attention and early treatment under the guidance of professional physicians.