Irritable Bowel Syndrome (also саllеd IBS, Spastic Colon, Mucous Colitis, Spastic Colitis, Nervous Stomach, or Irritable Colon) is the most common condition diagnosed by gastroenterologists. If you suffer from IBS, you’re familiar with how painful and difficult it can be to deal with. You may find your IBS impairing your ability to work – to the point of long term disability.