my dad had surgery in September 2008 to remove half of his stomach and a small part of his esophagus

Posted by kyhgomez

he had surgery in september 2008 to remove half of his stomach and a small part of his esophagus due to cancer! he is recovering and now for about a week he is having a burning sensation in his stomach and having stomach pain and gas! could you tell us what can be causing his stomach to burn and what is causing him so much pain now? it has been 5 months now and this has just started!