Can obstruct them: Significant pressure changes can sometimes cause pain in the sinuses. It can be relieved with decongestant nasal spray.
Answered 9/28/2016
5.8k views
Can cause pain: Aircraft cabins are pressurized to 8000 feet above sea level. The lower pressure inside the cabin can cause the air inside your sinuses to expand and push against any obstruction. This can cause pain.
Answered 3/26/2013
5.8k views
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