Recently easy to thirst, first of all against the diet, to see the current diet compared with the previous whether the eating habits have changed, drinking less water will appear thirst, whether the consumption of high-fat, high-salt food, these foods will cause thirst. Secondly, look at the amount of exercise, exercise is increased compared to the previous days, but water consumption has not increased, thirst will occur. In addition, the living and working environment has changed, living and working in high temperature for a long time, the lack of fluids in the body will be manifested as thirst. There is also to be alert to whether the body suffers from diseases, such as diabetes, hyperthyroidism, dry syndrome, etc. Suffering from diabetes when the sugar metabolism is disordered, the body’s blood sugar is high, the typical manifestation of thirst, drinking, eating and urinating. Hyperthyroidism patients with accelerated metabolism in the body, there will be thirst, dry syndrome patients are mainly manifested in dry mouth, thirst. There are also disease-induced electrolyte disorders, dehydration, blood loss, and excessive fluid loss that can manifest thirst. If a person does not have dietary and living habits, exercise and living environment changes, the recent period with the previous more prone to thirst manifestations, be alert to the body whether to suffer from disease, to the hospital in a timely manner, once the disease is detected, to be treated in a timely manner.