Stop Candida proliferation with Biotin (often, not high dosage) and you won't be chasing your tail. Also suspect a scalp infestation that hides externally when attacked itnernally. I would consider a proteolytic enzyme wash for the scalp, or an enzyme wash made for Scabies that is commercially available. I threw off scalp divots, a large pothole in my scalp and lots of crusty holes, after using a commercial enzyme wash made for Scabies. I'd hunt it down online and you should also be able to find some shampoo made with anti-Candida Caprylic Acid, used in some cosmetics. May the Great Physician grant us miracles of healing.