Core workout cause flare up?

Hey hey. First post. I found a thread 6 years old but wanted a current answer. Anyone workout or getting back at it and when completing core workouts get super sore and then have an I’ve flare up the next couple days. I have been eating very little and not different lately and can’t pinpoint a food trigger. I think it HAS to be the sore core muscles causing issues. Anyone else or have any advice?