White tea has refreshing, eye protection, antioxidant and other effects, moderate drinking is good for the human body, but if long-term or excessive drinking, it will have a certain impact on some people, so it is not recommended to drink. Common people are the following: 1, insomniacs: white tea itself contains caffeine and aminophylline, which has a stimulating effect on the nerve center, sleep disorders or neurasthenia of people drinking before bedtime can easily lead to or aggravate insomnia; 2, pregnant women: pregnant women occasionally drink white tea will not have a special effect, if long-term drinking white tea, will cause uterine contractions, resulting in fetal excitement, increasing the frequency of fetal movement, causing women during pregnancy produce discomfort. Moreover, the polyphenols in white tea have a certain effect of activating blood circulation and removing blood stasis, so long-term consumption can increase the risk of miscarriage, which may cause serious fetal malformation. If a woman is in the period before and after drinking white tea, there may be excessive menstrual blood or prolonged periods; 3, lactating women: white tea is rich in tannic acid, lactating women will be affected by tannic acid, so that the blood circulation of the mammary glands is inhibited, the phenomenon of insufficient milk secretion. In addition, for breastfeeding women, the caffeine content of tea can enter the baby through the milk, leaving it in an excited state, possibly causing insomnia, crying and other phenomena; 4, patients with stomach diseases: patients suffering from stomach diseases, such as gastric ulcer, duodenal ulcer, etc., after drinking white tea, may cause more secretion of stomach acid, thus aggravating the discomfort. In addition, white tea is a cold drink, the spleen and stomach cold people who drink white tea on an empty stomach, there may be loss of appetite, diarrhea symptoms, but also cause some damage to the kidneys; 5, heart disease patients: white tea caffeine and aminophylline, can enhance myocardial function, accelerate the contraction and diastole of the heart, for people with tachycardia or other heart disease, prone to induce heart attacks; 6, anemia patients. Iron deficiency anemia patients taking iron, drinking white tea may make it difficult to absorb iron in the stomach, affecting the therapeutic effect; 7, other: liver patients, urinary calculi patients, if there is nausea, bloating, jaundice and other symptoms, it is also not recommended to drink white tea for a long time.