You can drink salt water for heat stroke, and you need to. In heat stroke, the patient sweats a lot, even profusely, in order to dissipate excess heat from the body, and often vomits and has diarrhea due to damage to the gastrointestinal tract. In addition to evaporation of water from the skin and respiratory tract, patients often lose a lot of body fluids, which contain not only water, but also a lot of salt. When rehydrating from heat stroke, drink salt water, cool light salt water, not thick salt water. When preventing heatstroke in summer or the first signs of heatstroke in a hot environment, also drink cool light saline or a functional drink containing salt. Drinking only a lot of cool plain water or drinks without salt after heatstroke will make the electrolyte disorder in the body more serious, and the patient will experience muscle spasms and pain in the limbs, belly and back, and even the whole body, also called heat cramps.