Drinking too much water with a small amount of tea is usually not harmful to the body, and if too much tea is drunk, it may lead to gastrointestinal discomfort, sleep disruption and other hazards. Generally with a small amount of tea in water, drinking too much will not be harmful to the body. However, if you use too much tea in water, drinking too much strong tea may stimulate gastric acid secretion, which is easy to produce gastric mucosa irritation, patients will have abdominal pain, acid reflux, heartburn, diarrhea and other manifestations. In addition, drinking too much strong tea before going to bed at night may also affect the quality of sleep. It is recommended that patients with gastric ulcers, duodenal ulcers, gastritis and other gastrointestinal diseases should drink less strong tea, and can drink light tea in moderation. In addition, usually need to drink freshly brewed tea, avoid drinking overnight tea or spoiled tea. If the tea leaves are moldy or have a bad smell, avoid using the tea to make water.