It is best to drink tea 1-2 hours after meals, and people with gastrointestinal diseases are advised not to drink tea on an empty stomach. Just after a meal the stomach and intestines are in a full state, this time to drink too much tea, may increase the burden on the stomach and intestines, stimulate gastrointestinal peristalsis, affecting the absorption and digestion of food, causing gastrointestinal dysfunction. In 1-2 hours, when the stomach absorbs and digests more or less, you can drink tea in moderation. In addition, theophylline may stimulate the secretion of gastric acid, thus stimulating the gastric mucosa, so patients suffering from gastrointestinal disorders are not recommended to drink tea on an empty stomach, so as not to cause abdominal pain, acid reflux and other discomforts. After meals, it is recommended to rest for a few moments and then walk slowly in moderation to promote absorption and digestion in the stomach and intestines.