The surface texture is rough, as the truffle is covered with flat to rounded warts that are 0.5-3 mm wide; larger warts often have smaller warts on them.
Verruca plana, also known as a "flat wart", is a reddish-brown or flesh-colored, slightly raised, flat-surfaced, well-demarcated papule of 2 to 5 mm in diameter.
HPV types that cause genital warts are different from those that cause common, plantar, filiform, and flat warts.
Genital warts can look like verruca vulgaris or flat warts, but people who have genital warts often don't have any symptoms at all.
Other types of HPV cause common, plantar, filiform or flat warts, and some genital warts.
Like common warts, flat warts occur most frequently in children and teens.
In people with normal immune function, flat warts are not associated with the development of cancer.
Filiform warts , a kind of flat wart, can grow around the mouth, nose, and beard area.
Common and flat warts usually do not cause pain.