I have studied your case.
There can be infection and loosening of implant.
As pre your history infection needs to ruled out by tests
DO NOT IGNORE INFECTION IN POST TKR .
You may need to investigate like CRP ,CBC,ESR
,three phase bone scan.
PCR culture is very useful to find culprit organism.
If infection is confirmed then debridement is required .Persistent infection revision operation is required.
You may need revision total knee replacement
You can contact at our centre.
For further query you can directly contact on my ptofile.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.