Physiological saline can be taken directly by mouth, but be careful with the dosage. Clinically, saline, also called sterile saline, has approximately the same osmotic pressure as normal human plasma and tissue fluid. Saline has no other additives and is made in strict accordance with aseptic requirements. It is commonly used to flush wounds, replenish body fluids, dissolve medications, etc. It has no special therapeutic or pathogenic effects, so it can also be drunk directly. In general, after a lot of exercise, sweating, the body’s sodium will be lost, you can properly drink physiological saline to replenish sodium, usually want to hydrate directly drinking water can. In addition, it is not recommended to drink a lot of saline, long-term, because it contains sodium, drinking too much can easily lead to hypernatremia.