Drinking tea causes stomach acidity for the following reasons: 1, tea is thicker: especially green tea contains a lot of tea polyphenols as well as theophylline substances, causing irritation to the gastric mucosa, excessive secretion of stomach acid, drinking black tea will be relatively good. 2, suffering from acute and chronic gastric diseases: such as acute and chronic gastritis, gastric ulcer, duodenal ulcer, gastroesophageal reflux disease, gastric cancer, portal hypertensive gastric disease, etc., to further perform gastroscopy and H. pylori examination, for The treatment should be tailored to the cause of the disease. In daily life, eat more warm, soft, light and easily digestible food, avoid overeating, avoid stimulation of strong tea, coffee, alcohol, chocolate and cola, eat less and more meals, chew and swallow slowly, and ensure sufficient sleep.