My nose has been bleeding ever since I had upper and lower eyelid surgery 4 weeks ago. Is this normal? (Photo)

I had upper and lower eyelid surgery four weeks ago. It has been bleeding through post nasal dripping since day one. The amount is not significant but the small blood clots will come through my nose to the mouth when I try to empty my nose. Is this normal? In addition, I have bruises under my eyes and these areas are still very tender and puffy. I think the keloid has formed at the corners of my eyes. I am concerned.