These are skin problems because of HPV virus. They appear as outgrowths from the skin. The commonest areas are beard, face, head & private parts. Otherwise these can come up anywhere on the body.
The primary treatment for warts is its removal with electric cautery. The chances of recurrence in warts are very high. Palms and soles can also suffer from viral warts.
Warts are infective lesions and can spread from one area to other and also from one person to another.
The new M22 system has the IPL where a specific wavelength can be used to treat warts in areas where local injections are removals can be troublesome or painful. In case of multiple resistant plantar warts (warts over foot) IPL laser can show good results.