Electrolytes may be replenished by drinking light saline or electrolyte drinks for heavy sweating. Intravenous rehydration may be indicated in cases of severe dehydration. The body’s sweat contains not only water, but also a large amount of electrolytes, of which sodium ions are predominant. When sweating heavily after exercise or labor, hydration alone is not enough. If only water supplementation, may lead to hypotonic dehydration, depending on the degree of dehydration may appear dizziness, nausea, confusion and other symptoms. At this point, electrolytes need to be replenished in a timely manner, usually with light saline or electrolyte drinks. If the patient has nausea, vomiting, blurred vision, confusion and other symptoms, it is necessary to send to the hospital in a timely manner, through the nasal feeding or intravenous rehydration route to replenish fluids to replenish the lost electrolytes. After exercise, it is important to replenish electrolytes in a timely manner. If any of the above serious conditions occur, it is recommended that medical attention be sought as soon as possible to avoid delaying the condition.