Sugar is bad for you whether you have IBS or not. Also carbonated drinks. I also have a huge sweet tooth and sometimes just can't help myself, but I pay the consequences later. I've never liked carbonated drinks, so I don't have an issue there, but others might.Try not ingesting ANY sugar for a week (you can do it for a week) and see if there are any changes. Also, if you drink carbonated drinks, stop them for a week to see if it makes a difference.If you do see a marked improvement by cutting those out of your diet, it will make it easier to not eat sweets or drink carbonation.