Yesterday morning i woke up and the left side of my stomach felt sore, today it also feels the same way but not as much ..why would my side feel sore?

Clinic visit needed: There are many causes of abdominal pain, some of which can be simply annoying, like constipation, others can be deadly. The best way to make sure it's nothing dangerous is to be examined by a health care provider. Most of the time the cause can be determined with a physical exam and a few simple tests. Less often, an imaging study or looking inside the gut with a scope (endoscopy) is needed.