This problem manifested just before I went to uni nearly 2 years ago. Scalp was very red and itchy and I seemed to be constantly getting spots with white puss appearing.
Lived with it for a while, tried a few different shampoo's, but it stayed and was very itchy (during the winter time). Anyway, I visited the docter approx 5 monthes after it started but he was of little help. He prescribed a anti dandruff shampoo, which I used but it did little, maybe helped it a bit!
It seemed to quieten down alot over the summer, so maybe it's a seasonal thing? Anyway, I went back to head and shoulders shampoo (against the advice of people) because although it didnt clear the problem, it seemed to sort it alot!
Anyway, over the summer it didn't all go, but I only had brief outbursts. However, this winter it seems to have come back - it's only really got much worse the past 2 monthes, but I have quite a few white spots all over my scalp. My mum reckons its stress related (she has a point, when it first appeared I was just starting uni, and now it's come back strongly again i've had exams and also placements interviews (although I got the first one?!))
Really not sure where to go with this. I vistied the doc twice as I said above, and managed to get referred to a specialist... who gave me a more specialised shampoo, which helped a bit but didn't fully clear it :S... He said to come back, but I've been so busy and there appointments come and go.. so I find it really difficult to actually get one.
I'll post a picture tommorow when someone can take one, but if anyone has had a similar issue, and can offer any advice/solutions then i'd be greatful!
Sun seems to help it alot, if I have a sunbed it really helps!!