I don't know what's wrong with me. The skin on my head is falling off in chunks. There is no appearance of any marks or sores on my head... does anyone know what's wrong with me?

Are you losing hair? Is there any pain? Do you have dry skin? Please explain chunks. Do you grab a handful of hair and a great big patch of skin and hair comes off?

Most importantly, are you taking any medication?

Sorry to answer a question with a question, but the more info I get the better I can answer your question.

You have an inflammatory disorder of the scalp. Consult your doctor immediately.