I wonder out loud, again, if this could be related to the drop in blood pressure associated with low cortisol levels??? Has your child had their levels checked recently? I sure wish there was some kind of "quick" test we could do to test our CAH kids'blood levels (like a blood-glucose tester for diabetics!); maybe it will come! Has his doctor also checked for obvious things like allergies, etc ?? ('tis the season!) Good luck with the headaches - I will pray for your son.