Discoloration/bruising around nose tip? 1.5 yr post op

Had a septorhinoplasty a year and a half ago. It appears that ever since my surgery, there seems to be discoloration or bruising on either side of my nose tip. I thought they were shadows for a long time. But after a high intensity workout at the gym yesterday, these spots actually turned darker/blue as my face flushed. What could this be? I was unable to get a clear photo, as they are very light and just look like shadows where the skin curves around the tip. Help!