ER docs are usually interns and in a hurry, looking for something they can do something about, right now. If there was nothing to be concerned about they would not have told you to see your regular doctor but they could not do anything more about a swollen gall bladder (and not much you could have done either) so you have been sent back to your regular doc and/or surgeon, etc. to have them investigate further. Swollen does not necessarily mean there's anything one can do anything about, "why" it is swollen is the problem. I remember when I had my colonoscopy and my surgeon, after telling me about the two polyps, mentioned there was an inflamed patch of my intestine but that he wasn't "too worried" about it He may not have been but I still wonder, 10+ years later if it is better/worse, etc. Telling us things we can't do anything about and that we don't know the meaning of is probably not high on their list of things to disclose just so we can ask a lot of questions that they cannot answer (yet)?