Once you get a sinus infection once you are prone to them after.<p>What you need to watch out for is a clogged nostril, no air in the sinuses means an infection.<p>So that&#x27;s the goal: Get air in there.<p>Try antihistamines, they work sometimes - even if you don&#x27;t otherwise need them, if they clear your sinuses it&#x27;s worth it.<p>You can also try &quot;air hunger&quot;, if your body feels it needs extra air it will open the closed sinus. The best way to do this is to run up and down some stairs until it&#x27;s fully open - then get lots of air in there and blow your nose.<p>It&#x27;ll close right back up, but it will still help. Blowing your nose will also cause it to close, so hold off until it&#x27;s fully open, even if you feel you need to blow your nose right away. (Or do it twice.)<p>Another method is to hold your breath till you need air really really badly (not just a bit, but really badly), this can also cause it to open, but is more unpleasant (but might be your only option if too weak to run).<p>A tip for both methods: Close the nostril that was open before with your finger and breath a lot through the one that used to be closed. You might be able to convince your body to switch which sinus it closes. This is good since you can alternate and get air in both. Doesn&#x27;t always work though.