What could be causing swelling, pain and redness 2 years after rhinoplasty?

What could this be from? My nose healed without a hitch. It was the best decision I ever made. My doctor is one of the best, he is located in Newport Beach, CA. I did not injure or bump it anywhere. Today is the second consecutive day of these symptoms. It doesn't look too obviously swollen with the eye, but if you press on the affected side you can feel some sort of swelling/fluid retention on that side compared to the other side which is just skin and bone (the way it usually is).