I am suffering from seborrheic dermatitis (at least the doctors say that.) I have itchy scalp. Hair falls out (healthy ,thick hair). Some times with white flakes at the roots. I have had medications like ketoconazole, biotin and folic acid tablets, potent corticosteroids like beclometasone ,dutasteride, zinc acetate tablets also, aloe vera, moisturizers, nizoral shampoo, apple cider. Yeast free diet and anti inflammatory diet. Tried shaving off my head couple of times too. Nothing worked. I want to know the reason, why arent, my medications working. Is it something else similar too sd. Is it due to food intolerance? Scalp turns red. Itching, healthy hair falls out. Inflammation (mild). Rarely it cures itself for a day or some hours completely. Like once in two months. And my hair is too dull. And frizzy, and completely lifeless. Suggest me something.