100% blocked sinuses

My father recently had a CAT scan that revealed that his sinuses are 100% blocked. He doesn't have an appointment with a specialist until March 17th. Is there anything he can do to relieve the pain and pressure in the meantime and is surgury the only answer in a case like this? Also he and my mother are supposed to fly Boston to LA to visit me at the end of the month does that seem ridiculous for someone in his condition? Your advise is much appreciated. Thank you.
Jen Diamond

[National Jewish]

I am sorry I could not post this answer prior to your dad

[heyjudemaun]

A related discussion, respiratory was started.