Good question. This is worrying and you are correct,your son should have grown out of his ear problems by now. It is very unusual for euestachian tube dysfunction to continue so long. He may have another problem causing his repetated ear infections such as a condition called the immotile cilia syndome. He does need to be seen by an ENT specialist again especially if he has earache. It seems to be time for a second opinion here. Your son should be carefully examined and tested to try to find the reason why a 5 year old is still having such ear problems.
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