The nail bed is the area of skin beneath the nail plate. It is composed of living tissue and contains blood vessels and nerves, which provide nutrients and sensation to the nail. The health of the nail bed is crucial for the growth and appearance of the nails. When a nail grows, it extends from the nail matrix, which is located under the cuticle. The nail bed supports the nail and helps it adhere to the finger or toe. Damage to the nail bed can lead to issues such as nail deformities or infections, affecting overall nail health and appearance.