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 non-cancerous skin growths caused by a viral infection in the top layer of the skin. They can appear anywhere on the skin but they are most common on the hands and feet. Wart colors can range from skin-colored, pink, brown and white.arts are tiny skin infections caused by viruses of the human papillomavirus (HPV) family. The viruses that cause warts are passed from person to person, sometimes indirectly. The risk of catching hand, foot and flat warts is small.