Dear doctor. From last few month I am using betnovate -n for clear skin. But when I read about side effects I left to use it. But now on my face more acne and pimples with spot and on my nose bridge a dark patch. So recently I have started to use retino-a.But now I Fred up all this things. Now I am using barberries aquifolium q for external use without any thing .So should I use and how frequently I can apply this on my face and what time is best to apply .My main concern is nose bridge dark patch. Please help me doctor. I am waiting for your reply.