Profuse Nose Bleeding After Rhinoplasty

Some bleeding is expected after nasal surgery for the first few days. Excessive bleeding occurs when the mustache dressing is soaked through with blood every few minutes. This happens about 1% of surgeries. Severe bleeding is when blood is pouring out or down the throat and is very rare. Bleeding usually happens within the first two days but is possible for the first few weeks. Bleeding of this degree requires professional help and a trip to the emergency. Usually further surgery isn't necessary. Rather complete cleaning of all blood clots and copious decongestant nasal drops will resolve the bleeding. The two commonest areas are the turbinates and the very back of the nose where the large arteries enter the nasal cavities.

Although rare, post-operative bleeding is a well-known complication following rhinoplasty surgery. In the immediate post-operative period this bleeding is usually related to surgical trauma. When significant bleeding occurs, the nose is usually re-packed. In some cases endoscopic evaluation is necessary to determine the cause of bleeding. Under these circumstances, direct control of the bleeding site may be necessary.
                Bleeding that occurs three years after surgery, probably isn’t related to your rhinoplasty. Under these circumstances environmental factors such as dry air are more likely causes. 

I agree that you need an endoscopic nasal exam by an ENT or facial plastic surgeon to identify a possible source