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.
Bowels habits vary from person to person . Three bowels a day to one bowel once in three days is considered normal , however there is no universally accepted definition of the same . People with irritable bowel syndrome can stay constipated for days without much untoward effect on health . So seek medical attention if constipation is new to you or is associated with 'red flag  signs .