Talk to your doctor: Unless the collapse has been known to be present for a long time and stable, may represent infection, blocked airway (?Aspiration), congenital malformation, or even tumor (not likely in 17 yo). Can't give more detail without exam. See your doctor.
Answered 4/8/2013
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3 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
3 doctors weighed in across 3 answers
A doctor has provided 1 answer
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