1 A doctor can often identify which nerve is pinched in the neck or lower back based on what portion of the patient's arm or leg is affected. 2  A pinched nerve in the wrist from carpal tunnel syndrome typically affects the thumb, index, and middle fingers.
It is never normal to have abdominal pain, to start with. And even less to have it regularly. Bowel movement after meals is relatively normal (of course, depending on frequency, intensity, etc.), as a consequence of something called the gastrocolic reflex. Your symptoms might suggest an enhanced/exaggerated gastrocolic reflex, that is not uncommon as part of, or in relation with, an irritable bowel syndrome.
Causes. Diarrhea immediately after eating can occur with just about any bowel disease where diarrhea is a symptoms. However, it is more likely in a person suffering from 1  : Irritable bowel syndrome (IBS) and more specifically the diarrhea-predominant variety.t takes food that is eaten between 24 to 72 hours. Even in cases of diarrhea, the movement is much more rapid but not instantaneous in humans. Diarrhea immediately after eating is actually a consequence of bowel irritation and prematurely triggered defecation reflexes.