(pronounced LY-kin-PLAN-us), a common inflammatory condition. Lesions develop on the skin, genitals, and inside the mouth. When lesions form on the skin, they usually appear as reddish-purple, flat-topped bumps that can be very itchy. Inside the mouth, patches of fine white lines and dots form.

an eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs

A skin disease that can sometimes affect the vulva, vagina, and inside the mouth. The disease may cause infected areas to be white or to have superficial ulcerations, with accompanying itching and pain.

an itchy skin rash characterized by flat, violet-colored bumps that generally appear on the wrists, ankles, and lower back.

A common skin disease in which itchy, small, pink or purple spots appear on the arms or legs.

A skin disease common within the oral cavity, where it appears as either white reticular, plaque, or erosive lesions with a prominent T lymphocyte response in the immediate underlying connective tissue.

Lichen planus is an inflammatory disease that affects the skin and the oral mucosa.