How many stools have been bloody?
Is it bright red bleeding?
Are you having any abdominal pain?
How many days have you been on the steroid?
Thanks for your response that helps me to understand your situation better.
Since you have only been on them for 1 day it is highly likely that it is coincidental of taking the med and the bright red stools.
That medication is given for people with Charon's disease and irritable bowel syndrome that helps with decreasing inflammation. So in other words they help bowel disorders and are not known for causing this side effect.
It could be a hemorrhoid. I agree you would not need to go to the ER for this. Monitor your stools over the next few days. If it occurs again you will need to be examined.