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 non-cancerous skin growth that occurs when a virus called human papillomavirus (HPV) infects the surface layer of the skin. ... Warts on the bottom of the feet are called plantar warts, and those that occur in the genital area are called genital warts. ... Your provider is unlikely to order laboratory tests, however, you may receive a sonogram to confirm plantar wart diagnosis.