I have ALWAYS had seasonal allergies and they have gotten worse as an adult. I wind up making my nose raw and my eyes get so watery and my throat gets so itchy and my sinuses bug me on the worst days. And the sneezing never ends
However I was diagnosed with crohn's last year and happened to be flaring both in the spring and fall (and right now too). That meant I was on prednisone....one of the RARE good things that came from being on prednisone during those periods is that the first time in my life I did not have ANY allergy problems.
This spring i am currently at the end of my pred taper so I think it my seasonal allergies are trying to peek through but definitely aren't full force like they usually are. I suspect also that they may be causing some of my abdominal discomfort I have had this week in addition to aggravating my sinus cold.
Whenever I have been in allergy season, the only thing that seemed to work was Singulair (a prescription) and Zyrtec. The OTC stuff like benadryl worked for too short of a period of time and my symptoms kick in fast and hard when the stuff wears off so I have to rely on the two mentioned above for help.
Singular is an immunosuppressant so definitely discuss it with your doctor if you are interested and see how it may affect you and interact with any other medications you are on for crohn's.