The role of electrolyte water is mainly to maintain osmotic pressure balance in the patient’s body, replenish micronutrients and hydrate. 1. Maintain osmotic pressure balance: electrolyte water contains sodium, magnesium and other nutrients needed by the body. Appropriate consumption of electrolyte water can supplement the necessary inorganic salt ions used to maintain cellular osmotic pressure, which can maintain the osmotic pressure balance of body fluids and keep the shape of cells stable. 2. Supplementation of trace elements: electrolyte water contains a certain amount of sodium, potassium, calcium, magnesium and other trace elements, and proper consumption of electrolyte water can supplement the trace elements consumed by the patient, which can ensure the normal development and growth of organs in the body. 3. Supplementary water: due to the presence of electrolytes and other nutrients in electrolyte water, it can help patients better absorb water, avoiding the phenomenon of edema caused by high osmotic pressure of body fluids. Electrolyte water can help patients to replenish the loss of water and electrolytes, but you need to ask your doctor about the specific use of the water before use, so as to avoid overdrinking or blindly using the water to avoid the emergence of other symptoms.