You need to consult an orthopedic specialist at the earliest as you have also started feeling pain. A change in
the size, texture, color, association of pain etc in
is a cause of concern.
You will need to undergo X-ray of the concerned joint, maybe fine needle aspiration cytology to study the type of tissue and/or some blood tests.
See your orthopedic specialist at the earliest.
If you need more help, please feel free to contact. I’ll be happy to answer your queries.