I had Functional endoscopic sinus surgery (FESS) and Septoplasy surgery 6 weeks ago?

I had FESS and Septoplasy surgery 6 weeks ago and Im still some headaches though they are not really bad. Last week and today I had a post nasal discharge which is black in colour. It was a bit alarming! What could that be? Is it possibly blood from the original operation?

FIND THE BEST DOCTORS NEAR YOU

Cardiologists – Cosmetic Surgeons – Dermatologists – Ear, Nose and Throat Specialists – Gastroenterologists – Gynecologists/Obstetricians – Neurologists – Oncologists – Orthopedic surgeons – Pediatricians – Psychiatrists – Pulmonologists – Urologists