I have two family members with IBS so what I've seen is:

- long painful morning poops no matter what

- certain foods (red meat, pasta, garlic, etc) cause pain or cramps

- eating a meal requires a trip to the bathroom after

- later in the dsy, depending on how many coffees or what food they ate, there may be a poop demon that needs to be exorcised before bed

- the feeling may strike at ant time and not give them much warning to get to a toilet so they have to stick close to a bathroom sometimes

I'm not talking about acute symptoms or if you eat something that triggers it, just their daily routine. Imagine if eating the wrong thing wrecked your insides, but eating the right thing only gave you tremendous pain, cramping, and poops. That's what you hope your day will be like :/