Lichen planus is an inflammatory disease that affects the <span style = 'background-color: #dae8f4'>Skin</span>
and the oral mucosa, and presents itself in the form of lesions or Rash
The typical <span style = 'background-color: #dae8f4'>Rash</span>
of lichen planus is well-described by the "5 P's": well-defined pruritic(itches), planar, purple, polygonal papules. The commonly affected sites are near the wrist and the ankle. The Rash
tends to heal with prominent blue-black or brownish discoloration that persists for a long time.