Warts are caused by a viral infection of the cells found in the top layer of the skin.
Warts are skin-colored and feel rough to the touch.
There are several different kinds of warts. Genital warts These can be caused by one or more members of the human papillomavirus family. Hand warts are usually found around the nails, on the fingers and on the back of the hand. They are more common where skin has been broken and in the areas where fingernails are bitten or hangnails picked. Foot warts are usually on the soles of the feet.