Have you tried discussing this with a doctor? Some doctors would be willing to 
give you a prescription for extra oxgen while you are  in colorado. If not a 
regular doc, maybe a Naturopathic doctor would do this. It is not that 
difficult to get a tank . If you used oxygen while you were in Colorado and you 
were not experiencing difficulty, then at least you could rule other things out 
and you would know it was an oxygen problem. You mentioned TMJ. This proposes 
another question- do you have any or many root canals? A freind of mine had 
teeth damage from a fall and had root canals in the front of her teeth. 
Everytime she went in high altitiude, she would get head aches and pressure 
from where she had the root canals. She finally had the teeth pulled and it 
stopped this problem.(a drastic measure I know, and of course is just a thought)
 
---------------------------------
Need Mail bonding?
Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.