Good afternoon,

I've had a J Pouch since 2001 (due to chronic Ulcerative Colitis) and this is only the second time the following has ever happened to me, both times this year:

On Saturday evening I was unable to sleep due to pain in my abdomen,  my wife made me a hot drink and after an hour or so of sitting upright in bed the pain went away. This morning I  started work as normal then soon began to feel quite unwell.  The  pain had  returned and I was nauseous. Having  been sick a few times I now feel considerably better and I'm resting. Hopefully I can get back to work in a few hours time.

I'd very much appreciate please any advice on what could be the cause (just in case I feel poorly again later) and any tips you might have to prevent a recurrence. I suspect mushrooms (although I do chew them well) might be causing some kind of blockage - would that make sense? 

The only other time it happened was earlier this year, and again after vomiting everything went back to 'normal' almost instantly, although I was  tired afterwards. 

Many thanks in advance for your support.