I'm obese and i'm experiencing sharp located pain in my middle abdomen while eating or walking, gastroscopy was ok 1 year ago, can it be muscolar? thx

Not clear : there are many structures in your abdomen that we have to consider more.. It could be your gallbladder, it could be your pancreas and could be stomach, could be the duodenum, it could be many of these structures. Need to see a gastroenterologist and clarify these issues. Muscle pain can be a cause of abdominal pain but that has to be evaluated. You can discuss this with your physician and a gastr