I wasn't diagnosed until age 43 but looking back it explained so much of my life. In Therapy we traced it back to age 6. But no one diagnosed a child as Bipolar back then. Even most all Pdocs are unwilling to diagnose anyone under 18 .. Sure they can go ahead and help find meds that can help with symptoms.. Bipolar isnt a label anyone wants unless they truly have it as it can effect your ability to do get/certain jobs etc..