What can cause my 8 year olds sleep apnea if it not adnoids or tonsils.i don't want her on a cpap forever?

Possible : It could be the structure of your child's face. For example if there is a narrow upper arch. It might also be allergies that prevent your child from breathing through the nose. I would suggest talking with your sleep physician about what could be causing the problem and possible solutions other than cpap.

Tongue or jaw : If obstructive sleep apnea most likely is the position of the tongue against the back of the throat. There are various treatments some as simple as orthodontics to help correct problem. A thorough exam by a dental sleep apnea specialist may help. If it is a central apnea however. CPAP may be the best answer if not able to be resolved medically.