There is no absolute benefit to drinking light salt water. If body fluids are consumed excessively, proper consumption of light saline water can, to a certain extent, play a role in preventing dehydration and electrolyte disorders. Light salt water generally refers to salt water with a concentration of about 0.9%, of which the main components are water, sodium and other elements. In daily life, especially for outdoor workers, sweat evaporates faster, and the body loses water as well as sodium ions and other trace elements. If you drink saline water properly, you can replenish water for the body in time, and play a role in preventing dehydration and electrolyte disorders. In addition to outdoor workers, for people with diarrhea can also be under the guidance of the doctor, appropriate to drink salt water. However, it is not recommended to blindly drink salt water, China recommends that the daily intake of salt is generally no more than 5g appropriate. As most of the population does not have professional knowledge, the self-mixing of saline water may lead to a higher concentration, or lower. If the sodium content of saline is low, it will not be effective in preventing dehydration. Higher sodium content may cause symptoms such as thirst, while increasing the burden on the kidneys and the risk of developing long-term hypertension. Healthy people generally do not need to drink desalinated water. If hypertension and other related diseases exist, it is even more inadvisable to drink desalinated water, which may lead to an increase in blood pressure.