Any food allergies will increase histamine levels and cause more allergy discomfort, which may not be discomfort in the nose, but all through your gut and body. I used to get hives on my arms, till I got on the milk probiotics.
But that may have nothing to do with sinus infections. I have the narrow passages too, and they just don't clear right, whether the issue is pollens or just dust. So it's not just allergies, but all kinds of particulates that can cause me to infect.
Sudafed was my stand by for years, since it's a pure decongestant. But I found all antihistamines, or other drugs like Flonase would dry up my sinuses, causing even less drainage of dust that got up there. So use those when pollen is the issue, but don't take them when it's not. Or at least once in a while, stop and hammer it with the Sudafed.
Fortunately for me, when I started biking 30 miles a day, nearly all sinus infections stopped. I might have allergies from riding through a pollen storm, but no infections. This was because at that time my job involved eating dust all day doing construction tasks. On the ride home, I'd spit all that shit out helping a ton. 100 miles a week did the trick, any less I'd start packing up.
Once home, HELL YES on the filtered air. Easy to do. Helps a lot to at least sleep well. Put the good filters in your furnace in winter for sure. No need to suffer all night because your dogs fur is full of black mold or pollen.
Re the yeast, if that is your problem, it can get real bad. When I was very sick 4 years ago, I developed a bad case of fermenting gut. It made me even sicker for sure. The smoking gun for the yeast problem I had was funny smell breath, a headache that never went away, and severe brain fog. Essentially, I was hung over for over a year till I figured out what I had.
