A red spot still appear at my nose bridge 3 weeks after rhinoplasty, infection what's the reason? (photo)

After 3 weeks of post rhinoplasty surgery i got infection and my nose got swollen and big, and a red spot was on the bridge of my nose, after visiting my surgeon and got the necessary treatment, as the doctor injected my nose to withdraw the infection inside and antibiotics were taken, after 10 days my nose become normal and the rhinoplasty results began to appear but the red spot still there at the bridge of my nose and do not disappear as i am now 3 months post rhinoplasty.