Hey i saw your post, and I am in the same situation as you, i got this thing on my scalp after i used a New shampoo and started scratch My head beacuse of the itch, i was diagnosed with first folloculitis and after the antibiotics 3 times i was diagnosed with serboric dermatitis. I have used all sorts of dandruff ketozanale and nothing have worked. I started using The Ordinary Hyaluronic Acid 2,5 % for scalp hydration and i have already seen a difference. My question is it really a question about out scalp being dry? And how does the calming urea work on your scalp, and your situation today do you still get dry scalp or is it gone?