Hi, thanks for writing to HCM.
Persistence of pain at the operated site, swelling and difficulty in walking,Groin pain after a total hip replacement
is not considered as normal and is a matter of concern.
Either there could be an underlying infection or loosening of the prosthetic components (which I suspect, as the cause of your symptoms).
A detailed clinical examination, Biochemical investigations, Joint aspirations, radiological parameters etc are needed to establish the cause of your symptoms.
I suggest you to consult your treating surgeon and discuss the issues.
Hope this information is helpful. Good day