Pain or discomfort in upper central portion of abdomen, experienced as burning, aching, gnawing, or sore feeling, can be a symptom of gastritis (irritation or inflammation of stomach lining) or peptic ulcer (stomach or duodenal lining defect).
You may have additional symptoms like abdominal bloating, feeling of fullness, nausea, vomiting, heartburn, belching.
Alcohol is a common trigger of acute gastritis.
You may have developed a chronic form of gastritis (you'll need to be checked for infection with H.pylori) or you may already developed an ulcer.
If you are in your forties and you have these symptoms for longer than 2 weeks you may need to be examined with endoscope (highly suspected for ulcer).
Burning or gnawing pain in the central portion of abdomen between meals is usually a symptom of duodenal (first portion of bowels after stomach) peptic ulcer.
Best wishes!
Marija