The body should be treated with rehydration, which can be done by replenishing the body with a certain concentration of saline and electrolytes, etc. Rehydration is usually administered intravenously, and the principle of small amounts and repeated injections should be followed to avoid edema caused by too much and too fast injections. Dehydration in the body is often caused by certain factors, and it is necessary to consider removing the cause of dehydration so that the body can regulate itself to a normal osmotic pressure condition. If the dehydration is caused by high temperature or fever, and the body is thirsty and has little urine, the osmotic pressure balance in the body can be adjusted by drinking water. If the dehydration is caused by vomiting or diarrhea, it needs to be treated by rehydration therapy by inputting saline and glucose in moderate concentration. Dehydration can be harmful to the body and can be severe enough to cause asphyxiation, so care must be taken.