Water is the source of life. Lack of water in the body will affect the function of all organs of the body, so timely hydration treatment is needed. If the body is given water, the whole body blood can be replenished usually in about 1 hour. Water shortage in the body can be replenished by drinking water and infusion, drinking water can quickly replenish the lack of water in the body. The daily water requirement of normal adults is divided into 2500-3000ml, and if there is water shortage in the body, it is necessary to add more than 1000ml of drinking water on top of the supplemental water. Long-term dehydration, easy to trigger tonsils, acute laryngitis, bronchitis and many other respiratory diseases. When the blood volume is significantly reduced, atrial fibrillation can be induced, chest tightness, palpitations, dizziness, weakness and other manifestations, need to immediately go to the hospital for infusion treatment to prevent shock. If you drink water on an empty stomach, water only stays in the stomach for 2-3 minutes, that is, it quickly enters the small intestine and then absorbed into the blood. Therefore, usually drink water for about 1 hour to replenish the blood of the whole body. In addition to drinking water to replenish water in the body, the body can also be dehydrated through the intake of food to achieve the effect of hydration, such as water radish, lettuce, watermelon, etc..