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.
A wart is a small growth with a rough texture that can appear anywhere on the body. It can look like a solid blister or a small cauliflower. Warts are caused by viruses in the human papillomavirus (HPV) family. The appearance of a wart depends on its location on the body and the thickness of the skin. Palmar warts appear on the hand. Plantar warts affect the feet. As many as 1 in 3 children and teenagers are estimated to have warts, but only 3 to 5 percent of adults.