Lichen planus pigmentosus (LPP) is a condition characterized by persistent and asymptomatic slaty-gray pigmentation, predominantly in the face. The skin in the affected area becomes dry, dark and hyper-pigmented and the area spreads at a slow pace.

Though the underlying cause of lichen planus pigmentosus is unknown but it may be triggered by viral infections, UV light or the application of certain oils to the hair or skin.

Long-term homeopathic treatment gives good results, to control the further spread, to stop the disease activity and to reverse the hyperpigmentation to an extent. Complete recovery from hyperpigmentation may not be possible in most cases.