Good for you,
@PatientlyWaiting.....a cure, for at least awhile. I hope you found out what to take should this reoccur and would be willing to share it with us.
I've been dealing with allergies for 56 years now....my husband first, and then mine later. Rod's were the worst I've ever seen and the only help he had was Coricidin (about the only thing on the market at the time).
He never developed sinus problems, but I certainly did. Not much fun, are they? The first few times you really wonder what had hit you...then it's like the same old story. Now I have allergies almost year-round and he's doing much better (which isn't saying a whole lot). But then I swear that everyone who moves to Dallas develops allergies. There are a lot of specialists here...a big tip-off.
Yes, dust mites and the like don't help. Frequent washing of bedclothes is good and well, you can't control the ever-changing weather.
Insofar as moving, one doctor told me that allergies will subside for 2 years after a move and then be just as bad as ever, if not worse. So I hope your friend keeps his backpack handy @Andyr. It is odd that we seldom heard about allergies when growing up....and now they're everywhere. I found they began (with me) along with those horrible scented candles.
Pharmacists (not the people behind the counter) are a wealth of information and will usually point you to the correct OTC drug. It can be a long, drawn out affair if not caught early enough. Sinus leads to bronchitis and it lasts forever (it seems) and if conditions are right, will go into pneumonia. Let me know if you find something....I'm tired of not breathing.
Also I wanted to add that allergies can be the start of anxiety, & co. in some people. Not breathing can be the start of many problems....as always, it's finding the right doctor. In N.M. that wonderful smelling pinon wood used to really cause problems. I guess man really shouldn't go too far from where he was born. It's safest. Yours, Lenora