Drinking tea has a certain possibility to cause constipation, tea contains a part of theophylline and caffeine, substances into the digestive system, can increase the excitability of the nervous system, but also on the nerves that govern the gastrointestinal produce a certain inhibitory effect. Many people because of theophylline and caffeine on the digestive system nerves caused by the inhibition, and lead to slow peristalsis. When the gastrointestinal peristalsis is slow, the intestinal function of the contents of the discharge will be hindered, so some people will appear constipation phenomenon. When drinking tea is best to try to light tea, both to absorb the nutrients in the tea, while not affecting human health, but often drink strong tea, the possibility of constipation, indigestion and other symptoms will increase. Drinking tea should also pay attention to the time, it is best to morning and noon, try to avoid drinking at night, otherwise it will be because of nerve excitement, and lead to insomnia, but not conducive to human health.