Drinking water in hot weather does not quench thirst is generally a normal phenomenon caused by high temperature, but may also be the result of heart fire, yin and essence deficiency (deficiency of yin fluid and essence) and other diseases. 1. High temperature: When the weather is hot, the temperature is high, the patient’s sweating is relatively large, the water evaporates faster, so it is normal to drink water at this time without quenching the thirst. It is recommended to drink slowly in small sips and many times to relieve the symptoms of thirst. 2. Excessive heart fire: Excessive heart fire is due to the inflammation of the heart fire, the lack of fluids, the patient will be upset, mouth and tongue sores and other symptoms, which will lead to the patient to appear in the hot weather and drink water does not quench the thirst of the phenomenon. 3. Yin essence deficiency: most of the Yin essence deficiency is due to fever, miscellaneous diseases for a long time and other injuries caused by the depletion of Yin fluid, the patient will have a deficiency of heat, dryness and not moist and restlessness and other symptoms, which will lead to the patient to appear in the hot weather and drink water does not quench the phenomenon of thirst. When the patient has the symptom of drinking water in hot weather, it may be a normal phenomenon caused by high temperature and does not need treatment. If it is caused by a disease, the patient should seek medical treatment in a timely manner.