My stomach and back have been having dull pains with nausea for about a week now. why is that?

?location: If the discofort is in the upper abdomen with radiation to the back, then possibilities include inflammation of the stomach lining(gastritis), peptic ulcer, inflamed pancreas , gall stones and less likely would be bile duct stones or hepatitis. See your md if symptoms persist. Until then follow a bland, low fat diet and take mylanta after meals and at bedtime.