My 13 yo son has CF. He has been having problems with pancreatitis. He had an ERCP in October, which seemed to help for awhile. He began having pancreatitis again. Another ERCP was performed with sphincterotomy and stent placement. That was almost 2 weeks ago and he continues to have a 4-5 pain level. His enzymes are normal. He is being treated with oxycontin and oxycodone. What could possibly be the reason for his ongoing pain?

Summarized question: What causes pain after undergoing sphincterotomy?