Bruise or pressure.
Not true
From the red pigment of blood under the nail-bed.
It is likely to be a blood pressure problem. Go see your doctor asap.
The nail bed is part of the nail matrix called the sterile matrix. It extends from the edge of the germinal matrix, or lunula, to the hyponychium. The nail bed contains the blood vessels, nerves, and melanocytes, or melanin-producing cells. As the nail is produced by the root, it streams down along the nail bed, which adds material to the undersurface of the nail making it thicker. It is important for normal nail growth that the nail bed be smooth. If it is not, the nail may split or develop grooves that can be cosmetically unappealing.
you can't if you don't have a nail
The nail body, also known as the nail plate, covers and protects the nail bed, which is the layer of skin beneath the nail. The nail body is made up of layers of a protein called keratin and plays a role in protecting the tips of the fingers and toes.
The nail bed
lunale
Yes the nail bed is called the sterile matrix.
The nail part refers to the the visible part of nails on fingers and toes while the nail bed refers to the skin beneath the nail plate.
The nail bed is formed by the skin beneath the nail plate, consisting of a layer of epithelial tissue that is rich in blood vessels and nerves. It provides support and nourishment to the nail as it grows. The nail matrix, located at the base of the nail, also contributes to the formation of the nail bed by producing new nail cells. Together, these structures ensure the health and integrity of the nail.
the nail bed