A herniated disc may be caused by: 1  Wear and tear of the disc. As you age, your discs dry out and aren't as flexible. 2  Injury to the spine. This may cause tiny tears or cracks in the hard outer layer of the disc.
Definition of wart. 1a : a horny projection on the skin usually of the extremities produced by proliferation of the skin papillae and caused by any of numerous human papillomaviruses âcalled also verruca vulgarisb : any of numerous similar skin lesions not caused by viruses.
Warts are a skin condition - skin growths caused by a virus on the surface of the skin. It can be unsightly and sometimes painful. While warts can occur anywhere on the body, they are most common on the hands (known as common warts) or warts on feet (known as plantar warts). Warts can occur in a variety of shapes and sizes. A wart may appear as a bump with a rough surface, or it may be flat and smooth. Tiny blood vessels grow into the wart and may appear as dark dots in the center. Typically, the skin lines and creases over the wart are distorted. Warts can appear either alone or in groups.