Simple Definition:

Colitis is a medical condition that refers to inflammation (swelling and redness) of the colon (large intestine). It can cause symptoms such as abdominal pain, diarrhea, and rectal bleeding.

For example, if someone has colitis, they may experience stomach cramps and have frequent loose stools (diarrhea).

Very Simple Definition:

Colitis is a condition where the large intestine becomes swollen and red. It can cause stomach pain, watery poop, and blood when going to the bathroom.

For example, if someone has colitis, they may have a tummy ache and poop that isn’t solid. Sometimes, there may be red stuff in the poop.