Body dehydration can be replenished by drinking water and water infusion. Drinking water can quickly replenish the lack of water in the body, and drinking 8 glasses of water every day can prevent dehydration in the body. Water in the human body can be emitted into the air through the skin pores, every minute and every second water is evaporating, the body loses about 2L of water a day, so you need to replenish about 2L of water, by drinking water can achieve the role of hydration. Eating fruits and vegetables can replenish water, such as cucumber, watermelon, tomatoes, celery, grapes, etc. all contain a lot of water. When the body is extremely dehydrated it will produce symptoms, such as skin becoming dry, coma, increased body temperature, weakness of limbs, etc. It is necessary to go to the hospital immediately for infusion of saline and glucose to prevent the occurrence of shock.