@eeppeerr88 I'm sorry to hear you are still experiencing pain and swelling in the knee 5 years after your TKR. It does sound warranted to seek another opinion if your current doctor is unable to figure out why you are still having pain and swelling in the knee. If it were me and I had the ability to seek another opinion I definitely would do it. I did run across an interesting article that you might find helpful.

The Unhappy Total Knee Replacement Patient: Figuring out What is Wrong: https://holycrossleonecenter.com/unhappy-total-knee-replacement-patient-figuring-wrong/