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.
Though complete digestion of a meal may take more than 70 hours, dietary fat and cholesterol components are only measurable for approximately ten hours after eating. The twelve-hour fast rule has been deemed sufficient to prevent the influence of a single meal on the cholesterol test.