I too have Crohn's and chronic sinusitis. I've had 4 sinus surgeries since 2003.
There was a study pubished in the American Journal of Rhinology (2003) that showed people with Crohn's have a higher incidence of chronic sinusitis vs. the general public. The study was based on patient surveys and wasn't very tightly controlled, but it did show an elevated rate of sinus problems in Crohn's patients.
Chronic sinusitis is one of the more common chronic conditions, so lots of people have it but don't have Crohn's. But for people with Crohn's, it's definitely something to look out for. People with Crohn's often have lots of allergies, and this can lead to chronic sinus problems. Acid reflux can as well. And immunosuppression from Crohn's medications can lead to sinus problems too.
STYX: I don't know if there is a correlation between IBD and sinusitis. Personally, I believe there is. I have asked, and thedocs don't seem to think so. But I have a hard time believing it. I can tell you, I NEVER in my life had a sinus infection until I was diagnosed with IBD. Now, I seem to get them approximately twice per year and it takes usually 15-20 days (not the usual 10 day course) on a strong antibiotic such as Levaquin to get rid of it. I am usually miserable for days. I cower when my daughter or her friends come into the house with colds because if I get it, it starts the whole cycle. Good luck.
Female, 46, indeterminate colitis for 9 years.
Interesting, this January, I had probably the worst case scenario of sinusitis -- ever! I had no idea that it could be interlinked to Crohn's! Wow! It seems that every (or every other) f'n winter, I come down with sinusitis! I know this may sound strange, but on a comparative scale, bring on the cramping and diarrhoea! -- as compared to that sinusitis crap! As I wish for neither (of course), but I must say that I really detest experiencing sinusitis! All that coughing, spitting phlegm up, sneezing, and all that crap! I hate it with a passion! (I think you get the idea as to the degree of just how much I do not like to have that sinus flaring up business)!
Now, I suppose there is no way to avoid sinus flare-ups (especially having CD) now is there? If so, please let me know!