myself suffering with lichen planus pigmentosa over a period of 1 year or so,basically started with photodermatitis 3-4 years back,but oflate pimentation of face
steroids, long term antibiotics, oral antifungal agents, phototherapy, acitretin, methotrexate and hydroxychloroquine. You can discuss these treatment options with your dermatologist.
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 doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.