My son was ALWAYS hairy, but when his levels were off, he would actually get the out line of beard/moustache and get more & thicker hair down his spine. As for the behavior, back when he was in second grade (7-8 yrs old) his levels had been "off a bit" for a while, but his Endo hadn't changed his dose, then one day on the school bus he just "lost it" and choked another kid who had been hurting his friend. This was TOTALLY out of character for my other-wise loving, affectionate, caring, understanding son. When I told his Endo about this incident, I also insisted that he change his dosage because I was absolutely possitive that his levels being off for too long was causing him to become aggressive. Well, his dosage was increased, and he returned to "the little lover-boy" I knew.