One more symptom is a harsh abdominal pain as the result of wrong metabolism and reaction to a heavy food such as French fries or fried chicken. Abdominal pain is the top discomfort. It can be mild, medium, or advanced. Usually, the upper area of the abdomen is the one to be damaged first and for most. It is known as the pit. This ache has a dull nature, but it can be rather harsh and even shooting.