I have upper abdominal pain. At first, I was nauseous. After that, I bought medicine for 4 days but the situation was still the same. When I eat full, it hurts but when I'm hungry, it hurts, I burp often. So the doctor asked me what is the sign of the pain in the upper abdomen with nausea?

Recently, I have symptoms of bloating, indigestion, hot stomach and frequent belching, body or fatigue. The doctor told me that bloating, or belching, is a sign of disease? What is the treatment, doctor?