scabby red scalp

[jonnykino]

NO PICS TODAY. NO QUESTIONS REGARDING MY PARANOIA, JUST A QUESTION ABOUT MY SCABBY HEAD.

my scalp is bright red. i'm fair, so it could be that it's sunburned slightly as well, but i'm in england and there's no sun. anyway, towards my crown and the back of my head it's scabby. sometimes if i scratch my head i accidentally pull of a yellowish scab. my head also get's very itchy when it's hot, and sometimes it just feels uncomfortable. i've been the docs about it and she gave me ketopine (niz?), and it didn't do anything. she then gave me some coconut moisturiser crap, and that did nothing. i used polytar for a bit, and went back the docs and she said it looked better, but it was still scabby. i'm back trying niz (branded) and as of yet nothing has happened. it hasn't been diagnosed either, at least, my gp hasn't told me what it is.

anyone got any ideas what it might be and what shampoo's or whatever i should use to clear it?