Hi, infections can affect the liver. Hope a hepatitis panel has been done to rule out a hepatitis infection. Sometimes the medications used can also elevate the liver enzymes. So, if he does not have symptoms of liver disease like jaundice, nausea, vomiting, abdominal pain and fever, I would advise you to wait for now and repeat the test after four weeks to see how the levels are progressing. And have him vaccinated against hepatitis A & B. Regards.