http://www.mayohealth.org/home?id=AN00139
Question: Can abdominal adhesions simply limit the normal flow of the intestinal contents without a complete blockage? If so, would these cause symptoms such as nausea, stomach pains, bloating, constipation and faintness? Answer: Yes, abdominal adhesions can partially obstruct the small bowel and cause the symptoms you describe — with the possible exception of faintness. However, fainting may occur from severe cramping pain or dehydration. Vomiting may also occur. Still, all of the symptoms you describe are nonspecific and may have many other causes, as well.
A complete obstruction typically causes severe cramping, nausea and vomiting that persists until the obstruction is relieved. With a partial obstruction, symptoms may be milder and intermittent. If intermittent, a partial obstruction may require no treatment. If persistent, then treatment may be necessary.
Adhesions — fibrous bands of scarlike tissue that form between two surfaces inside the body — most often occur following abdominal surgery. Abdominal adhesions generally don't cause symptoms unless they obstruct the small intestine or, less frequently, the large intestine. Obstruction may occur intermittently, making it nearly impossible to diagnose the problem between attacks when tests for obstruction are negative. However, X-rays of the abdomen taken at the time of symptoms should help confirm the diagnosis.
Other conditions that may cause symptoms similar to those you describe include:
* Colon obstruction. For example, due to colon cancer or diverticulitis, a formation of small, bulging pouches in the digestive tract
* Stomach outlet obstruction. For example, due to a peptic ulcer
Symptoms such as cramping, abdominal pain, nausea, vomiting, inability to pass stool or gas, and bloating warrant prompt medical attention.