thanks Bhupinder for that enlightening comment
Hello,
The cause of lichen planus is unknown but there are some triggers for it which include stress, food and environmental allergens, genetic tendency, drugs and systemic illnesses.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.