He suffers from mouth ulcers and has in the past had bad breath. With me being a dental nurse I thought he wasn't cleaning his teeth. So I decided to do it for him but he still got the bad breath. Now we know it's the IBS that's caused this. He has also had quite bad headaches in the past, we found out last April he had IBS since then it's controlled by buscopam and tabs, the headaches mouth ulcers and bad breath have all but gone. Except when he gets a flare up. Then he also has back ache the poor lad.