My boyfriend has an issue with one of his fingers on his left hand. When he bends it it makes a "clicking" sound. He has been to a doctor who said it is probably Trigger Finger but I do not believe it is. Is doesn't hurt... It just clicks all day, constantly when he bends it.. Like its out of its joint or something. He thinks it happened after he got electrically shocked one day.. Do you know what this is? How can he treat this?