Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Liver problems can cause pain in the area you mentioned as well as anorexia and fatigue. Mostly this is because of fatty liver (alcoholic or non alcoholic which is associated with obesity) other cause would be drugs, infection, or some rare causes. I would advise you screen for viral hepatitis, and get an ultrasound done to see for your liver, that would most of the time sort out the problem. Hope I have answered your query. Let me know if I can assist you further.