Q: Are there are any known causes or contributors to lichen planopilaris?
A: At present, the cause of lichen planopilaris (LPP) is unknown. Some researchers have studied whether triggers like medications or viral infections could be related but there is no good evidence for such involvement. It appears LPP is more common in women. Stress does not appear to be a cause either - but some patients notice worsening of itching, burning or shedding at times of stress.