A toenail is a hard protective covering found on the tip of each toe. It is made of a protein called keratin, which is also found in hair and skin. Toenails grow from the nail matrix, located under the cuticle, and serve to protect the sensitive tissues of the toes from injury and infection. Toenails can vary in shape, size, and color among individuals. Regular care, such as trimming and cleaning, is important for maintaining healthy toenails. Common issues include fungal infections, ingrown toenails, and discoloration, which can affect both appearance and comfort.