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.
1 Warts are small, self-limited tumors caused by human papillomavirus (HPV) infection. 2  Types of warts include common warts, flat warts, plantar warts, periungual warts, and filiform warts. 3  Warts typically disappear on their own with time, but it may take years. 4  Warts respond variably to a variety of treatment measures.