Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. It is very difficult to treat skin diseases without seeing it. However, such extensive type of scalp fungal infection needs oral anti fungals like Terbinasil. I would advise that you should see a dermatologist to confirm it and to write treatment for you. Another possibility would be psoriasis of the scalp, your dermatologist would probably exclude it by seeing the lesion. Hope I have answered your query. Let me know if I can assist you further.