You should not drink tea water when you have a fever. Tea contains theophylline, caffeine and tannic acid, which have the effect of stimulating the central nervous system, enhancing blood circulation and promoting a faster heartbeat. When you have a fever, if you drink tea, it will make the patient’s body temperature rise and further aggravate the condition. In addition, ginseng tea also has an excitatory effect on the nerves and is also not suitable for consumption. In addition, the tannins in the tea also have the effect of astringency, which will affect the body’s perspiration, hindering the normal heat dissipation, body heat if you can not get effective distribution, it is difficult to lower the body temperature in time, which will affect the recovery of the patient’s body. Therefore, you should drink more warm water when you have a fever. In addition, tea water will also affect the decomposition of drugs, absorption, reduce the efficacy of drugs.