The loss of body fluids resulting in a decrease in extracellular fluid is called dehydration. When people work in high temperature conditions, intense exercise or certain diseases (such as violent vomiting, severe diarrhea), they will lose a lot of water and inorganic salts (mainly sodium), which will lead to a decrease in the body’s extracellular fluid osmolarity and symptoms such as a drop in blood pressure, increased heart rate, four chills, and even coma in severe cases. Patients with extracellular fluid reduction should eat more fresh fruits and vegetables in their diet, and eat some, apples and peaches as appropriate. The following foods are recommended to eat in moderation: 1, cucumber: rich in water, and rich in fiber and vitamins, the gastrointestinal tract emptying have a very good role in promoting recovery. 2, eggplant: rich in vitamin B, has a good nutritional neurological role, is conducive to improving the function of the intestinal mucosa, promote intestinal evacuation. 3, tomatoes: rich in vitamin C, has a good role in nourishing myocardial cells, is conducive to alleviating the disease caused by the body circulation dysfunction and other symptoms of relief.