Hi welcome to the health care magic Here pain is right sided abdominal not severe enough and not on left side It can be from referred pain of gastritis or chronic constipation It could be musculoskeletal pain if no obvious cause found and pain aggravation by some movement.. According to cause specific treatment given For gastritis antacid like pantoprazole prescribed Here EKG also done to rule out cardiac cause although seem less likely If abdominal pain associated than USG done Take care Consult physician for examination