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 viral infections of the outer layer of the skin caused by the human papilloma virus (HPV) . Warts are more common in children because children have less developed immune systems than adults. Most people develop only a few warts, but, in some cases warts become large and cover many areas of the body. Warts are contagious but contrary to popular myth they are not spread by frogs.