Rehydration solutions are specially formulated liquids designed to replenish fluids and electrolytes lost due to dehydration. They typically contain a balanced mix of water, salts, and sugars, which help restore the body's hydration levels. These solutions are commonly used in cases of diarrhea, vomiting, or excessive sweating. Oral rehydration solutions (ORS) are the most widely used type and can be easily prepared at home or purchased in pre-packaged forms. The World Health Organization (WHO) recommends ORS as an effective treatment for dehydration, especially in children, to prevent serious health complications.