What would cause liver enzymes to be elevated briefly? alt 107, ast 72, and then returned to normal on 6 week lab recheck- alt 31, ast 15

Liver inflammation: The most common cause would be viral hepatitis but can be seen with infectious mononucleosis, other viral infections,certain medications, or transient congestion in the biliary tracts from stones. Your physician or a gastroenterologist can order the appropriate tests to try to pinpoint the cause although the problem appears to have cleared fortunately.