People can have back problems unrelated to IBS of course, but people with IBS can also have back problems from excessive muscle tension and the gut muscles are coonect to the lower back muscles.One thing that may help aslo is progressive muscle relaxation perhaps. http://www.rochester.edu/ucc/pmr.htm However, I would see a doctor to see if it is back problems in an of themselves if they don't always correlate with attacks and also ask them about doing the PMR.