What to do
You don't have to have Crohn's Disease or Ulcerative Colitis to take part in the campaign - everybody can get involved!
Take a photo of your tummy and share it on Twitter, Facebook or Instagram, adding the #GetYourBellyOut hashtag.
If you don't want to share a photo of your tummy (but still want to get involved), you can go straight to making a donation by text or online.
How to donate
Send a text message saying IBDA99 and the donation amount to 70070.
For example if you wanted to donate £3, then you would text (without quotes):
"IBDA99 £3 to 70070"
If you can't make a text donation, then you can donate online instead at JustGiving.
All donations will go to Crohn's and Colitis UK.