substernal pain

A 50-year-old man has been suffering from substernal pain for the last 5 months, particularly on waking up in the morning. He lost his job a year ago and was suffering from depression. He consumes about 12–16 cans of beer every day. He has lost his appetite too and says that eating aggravates pain.1.  Is this acute or chronic gastritis?2.  What factors may lead to the development of gastritis?3. What investigation should be performed?4. How can the patient be treated?*****   Your responses should clarify your understanding of the topic. They should be your own, original and free from plagiarism. Use correct medical terminology, spelling, and grammar and  APA format

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