Is a rotting smell after rhinoplasty normal?

Decreased cilia motion can cause the nose to have a "rotten" smell or dead meat smell.  The use of dilute hydrogen peroxide can help decrease the smell. Typically the smell disappears around week 8-12.  Best Dr. Anil Shah

What you described is not normal and your surgeon should be made aware of this.  There could be bacterial colonization (or worse) causing this.  Maybe some packing  material was left?  Don't assume this it's normal.