I'm trying to figure out what could have brought on terrible smelling gas all of a sudden. I can't even handle the smell. I haven't been able to pinpoint foods that cause it. Could it be from taking new antibiotic? However, I stopped taking it to see, and the gas has continued. I don't know what to do - it's awful. I have suffered from mild IBS for years - primarily gas/bloating/pain. Thanks for any advice/comments.