Expost

Hey everyone, I'm obviously new here, but after reading some posts, I thought to myself that this is the place to ask some questions. My hair loss problem goes back to when I was 16-turning 17, and had a terrible bout of psyoriasis around my upperforehead and temples(sp?). Anyhow, I was not exactly smart about it and scratched the living crap out of the area, and after it cleared up, everything seemed fine. Anyhow by 18 both the areas around my temples were looking bald (and I really feel like I hadn't noticed until 18) ,and I now looked like I had a receeding hairline. I was and am very self concious about it, and have been battleing with myself on keeping positive/staying confident without a hat ect.. However most people I know don't even notice it, or say it's not bad. I'm now 22 and it seems that the loss hasn't gotten worse, since it really looks like MPB, but I really would like to figure out if the hairloss I have was caused by the psyoriasis or if I am losing my hair the old fashioned way. Are there any ways I can figure this out? Also, could a HT help square my hairline up again? I'm pretty much a NW2 with really far back temple areas. (I have a widdows peak on the front, so it looks pretty funny if I try and pull off any "up" hair style)