I want to help my mum out, IBS related problem.

My Mum suffers with quite severe IBS and has done for a while now. She does quite well but has periods of time that are just terrible. She’s a very busy woman, works full time and looks after us kids and my lazy step dad. I just had a conversation with her and she’s having a rough patch, she said a lot of the food she usually eats is making everything worse, it’s now down to every single meal she has just doesn’t sit well at all. She doesn’t really have the time in the next week or two for a doctors appointment to discuss it and she’s so proud that she thinks seeing a doctor about what to eat is silly. I was wondering if any of you Flutherites suffer or know anyone that suffers with this condition or have a better knowledge than I do of the condition and could offer up some meal ideas? Any nutrition advice would be helpful, I sort of don’t know what I’m expecting to hear back because this is such a broad and vague question. Any ideas about specific foods that might not be so harsh on her, or could relax her pains at all would be great, thanks.