A wart is harmless, though contagious, skin growth that feels rough to the touch and is often characterized by minuscule clotted blood vessels that resemble tiny black dots. Though not a health risk, you may wish to have it removed because of social embarrassment. Warts can be caused by a variety of factors, the most common of which are the following: common – gray or brown growths with a round top that grow anywhere, particularly on the fingers or toes; plantar – growing into your skin, rather than protruding from it, they are hardened growths on the soles of your feet, making walking difficult and painful; flat – small, flat growths that can be pink, yellow, or brown, and which often develop on the face, arms, or thighs, filiform – small, flesh-colored skin flaps on your nose or around the mouth, chin, or neck; and periungal – painful growths under or around your nails, often inhibiting nail growth.
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