I was dx w/ibs younger. im 28. what causes variation in stool size & shape excluding cancer? could tension/anxiety/ibs cause the change? why? thank yo

See answer: altered bowel habits is a feature of IBS and relates to several factors including spasms of the bowel, altered bacterial environment, and sensitivity to certain food triggers. For many IBS patients, stress/anxiety seem to provoke the already sensitive nerves and can flare up their IBS symptoms. More info here: http://www.uptodate.com/contents/irritable-bowel-syndrome-beyond-the-basics Good luck!