Sits_inthe_corner has given you excellent advice. If your scalp issues are Lupus lesions, then Plaquenil will probably be the best treatment. Usually, doctors will give you Plaquenil with Prednisone to speed up the process because Plaquenil can take up to 6 weeks before you really see significant results. The good news is, once the Plaqeunil heals the lesions, they almost never come back!
When you talk to your doctor, ask about Plaquenil, if they are indeed Lupus lesions.
Peace and Blessings
Look For The Good and Praise It!