In heatstroke, you should drink cool light salt water or a refreshing functional drink containing salt, because the heat accumulated in the body during heatstroke needs to be dissipated quickly. In heat stroke, sweating, evaporation of skin and breath, vomiting and diarrhea will make the patient lose a lot of body fluids, which contain not only water but also salt, so it is necessary to replenish both water and salt. Therefore, cool light salt water and functional drinks containing salt are the best choice in heat stroke. Hot drinks are not conducive to heat dissipation, and drinking large amounts of drinks without salt will aggravate electrolyte disorders in heat stroke, which can lead to muscle spasms and pain in the limbs, abdomen, back muscles, and even the whole body of the patient. When it is impossible to avoid heavy physical labor or sports exercise in high temperatures, it is also advisable to drink large amounts of cool, light saline water or beverages containing salt to constantly replenish lost water and salt in order to prevent heat stroke.