For as far back as I can remember I've had horrible dandruff. In 2nd grade, I was so embarrassed because during a regular lice check at school, the school nurse made a nasty comment about my "cakes of dandruff." And coinciding with this dandruff is a horrible, almost unbearable itch. All day, but especially at night, my scalp, starting from my crown all the way to the bottom of my hairline and along my hairline on my forehead, itches so bad that I accidentally scratch until it bleeds and believe me, it's so painful you'd think I'd learn, but it seriously itches that bad. For what seems like my whole life I've been trying various dandruff shampoos but none of them have given me any relief to flakes or itch. Does it sound like general dandruff, or something more serious like excema or psoriasis? Is it something worth going to a dermatologist for?