Jalapeno peppers do make you poop just like other foods.
But some foods like Jalapeno peppers can make some people poop more often and sooner and if you eat too many Jalapeno peppers you can get a stomach ache as well as diarrhea.
And that diarrhea is gonna be painful because of the heat contained in Jalapeno Peppers.
Whenever you eat Jalapeno Peppers and poop you usually have a burning sensation when pooping because of the Capsaicin contained in Jalapenos.
Some people get diarrhea just by eating a few Jalapeno peppers because their digestion system doesn't like them but some people it takes more than a few to get your bowels moving and for you to poop or have diarrhea.