In general, everyone can drink Pu-erh tea in moderation. Anemia patients are not recommended to drink a lot of Pu-erh tea, easy to affect iron absorption. If you suffer from gastric ulcer, neurasthenia and other diseases, it is also not recommended to drink a lot of Pu-erh tea, easy to lead to aggravation of the condition. 1. anemia: Pu-erh tea contains tannic acid, tannic acid will have an impact on the absorption of iron in the body. 2. Gastric ulcer: Pu-erh tea contains caffeine components, drinking will accelerate the secretion of gastric acid, easy to cause irritation to the ulcer site, not conducive to the recovery of the condition. Therefore, it is recommended that patients with gastric ulcers usually maintain a warm, light diet, avoid drinking a lot of tea, coffee and other beverages. 3. neurasthenia: caffeine also has the effect of excitation of the nerve center, so patients with neurasthenia is not recommended to drink, or prone to insomnia symptoms. If you drink Pu-erh tea during the discomfort symptoms, it is recommended to stop drinking, to the hospital.