I would think the aggressive behavior would be more likely to occur if her medication level was too low, thus more testosterone in her body.  If the levels are correct, could she be possibly acting out of anger at being different, having to take meds, etc.  Not agreeing with the doctor, but I would be careful not to use (or let her use) her CAH as an excuse for any behavior issues.  She will have CAH all her life and she will have to learn to control her feelings/emotions at some point and it would be best if it occurred at an early age.  Could it be something other than the CAH?  Either way, I would stress to her that it’s ok to be angry, but give her constructive ways to channel that anger.  As for being strong-willed, that’s not necessarily a bad thing.  My mom used to tell me that I had to break my daughter of that and my response was that if it is channeled in the right direction it will serve her well when she gets older.  She is now 16 (almost 17) and has had other medical issues to deal with besides the CAH over the years and it is that determination that helped her to get though when she was faced with a chronic pain issue.  I know it is difficult to see your child have to deal with all of this.  I know she has been through a lot because sometimes I would wonder how my daughter could go through all of what she has faced.  I think the CAH has made my daughter stronger in many ways.  You daughter is lucky to have a mother who is so caring and concerned about her.