Yeah, I don't understand how lasercomb makes hair appear thicker either, but I don't think it's it just "puffing" up my hair... only because I use a regular brush too, which is, aside from one having lasers and one not, essentially the same thing. Stax said something about the lasercomb swelling the root of the follicule thus making the hair appear thicker temporarily. I don't know if there's any truth to that but maybe that has something to do with it. Lasercomb does make my hair seem thicker right after I use it though, I dont think it's just "puffing".
I'm going to cut down on using it to twice a week and see if that helps anymore. My scalp has been alot better but that could very well be a result of either the finasteride, nizoral, locoid lotion, and/or cold water i've been using. Other than that the LC's only real benifit i've noticed thus far is the temporary thickening effect.