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 on a person's hands or feet. It looks like a solid blister or a small cauliflower. There are several types of wart including common warts, verrucas, plane warts, filiform warts, and mosaic warts. Most warts disappear on their own and do not need to be medically treated.