Thanks for posting your query.
I am Dr.Ratnakar Kini and I am pleased to you.
Most often it is due to stone in the common bile duct. But since stents have been placed, it is less likely. On the other hand, a blocked stent may cause this symptom. There may be additional symptoms like fever and jaundice
depending upon whether is complete obstruction and which of the stents is blocked.
But sometimes it can be due to unrelated causes like a peptic ulcer disease
. An upper GI endoscopy
and a ultrasound
scan of the abdomen may be done for evaluation.