👉 Rehydration refers to the process of replenishing the body's fluids and electrolytes after a loss of fluid or when the body is dehydrated. This can happen due to various causes such as dehydration, vomiting, diarrhea, heat stroke, etc. The body needs water and electrolytes to function properly, and when these are lost through bodily fluids like sweat, tears, urine, and saliva, it leads to dehydration. Rehydration involves replacing the lost fluids and electrolytes with normal fluid intake or