Irritation/inflammation that causes the ileocecal valve to either get stuck shut or stuck open can be caused by a variety of things:
-low HCl that allows lower pH food content to irritate the valve
-small intestine bacterial overgrowth - recent studies link this to ileocecal valve dysfunction
-eating while under stress: too quickly, not chewing properly, while stressed
-and whole host of other things.
Have the chiropractor show you (or your client) how to massage in a downward motion (for a valve stuck open) or massage in an upward motion (for a valve stuck closed), and where to massage. Most people can learn how to fix their own stuck valve. If this fails to resolve problems then there may be another cause or another chiropractor appointment may be necessary. The appendix is in this same area, so don't ignore crampy pain here if it persists or is accompanied by nausea/vomiting.
Signs of a stuck ileocecal valve are usually diarrhea (stuck open) or gas, bloating, crampy pains around the abdominal cavity (stuck closed), and many people with a consistent problems here get diagnosed with IBS.
Some people's valve gets stuck frequently because they haven't properly determined and then remedied the cause of their trouble, so learning to fix it yourself with some abdominal massage can be helpful while you're researching the cause of the irritation/inflammation.