Welcome to the ehealthforum and I am glad to help you out. The likely possibilities of the pain in the left side of abdomen are acute gastritis or a peptic ulcer. If the ulcer is present in the stomach, the pain gets worsened on eating. The confirmation of the diagnosis is possible only on endoscopy. The treatment consists of antacids, drugs which inhibit the acid production like omeprazole, pantoprazole etc.
Other possibilities which can have a similar presentation are a stone in the gall bladder (diagnosed by an ultrasound) or acute pancreatitis for which one needs to do a CT scan and the serum amylase/lipase are elevated. I’ll suggest you to consult a gastroenterologist for the confirmation of the diagnosis.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.
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