I don't know what ser. derm is. I'm assuming you had it taken care of though cause your scalp doesn't appear red. I would look up information on line regarding whatever that condition is, and see if people had hair loss, if it subsided, or if it was permanent. In terms of hairloss in your family you should be looking at father, uncles, grandfathers, etc. If any of them have it you could have it. Sometimes it gets triggered early in people.
I had a friend who had a similar diffuse look. It came very quickly (within a year), but he didn't have anything that triggered it to my knowledge. I just figured it was male pattern baldness setting in real early. (he was 17-18). It finally kinda stopped, and i think he still has the same diffuse hair. I would try to keep your scalp in good shape, and see if it gets better. It definately doesn't seem to bad, but if it came quickly, and it's getting worse then it's definately cause for concern, and then i go by my original recommendation of propecia, and some good shampoos.
