Hello,
From the symptoms it can be due to dandruff, allergic reaction, contact dermatitis or eczema. Eat a healthy diet. You can also take vit B6 and vit A and E which are good for hair and skin. Try medicated shampoos for dandruff. There are a number of over-the-counter shampoos available that can help. The most effective ingredients -- antimicrobials -- to look for are zinc pyridinethione, selenium sulfide, sulfur and ketoconazole (also available by prescription). If your hair is colored, don't use products with selenium sulfide or sulfur.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Hello mepaule,
There are several causes of your symptons. Infections, eczema, psoriasis, etc. The best option is to go to a dermatologist. They will look to the harden flakes and exam your scalp and will prescribe something to heal.
Take care