How long should I have yellow crusts on nostril & scabs inside? (Photo)

Most crusting and scabbing should resolve after 2 weeks after routine closed rhinoplasty. It may take up to 4 weeks for some sutures to dissolve. Crusting can accumulate around the sutures until they are trimmed or fall out. If you have prolonged scabbing fro more than 6 weeks, there may be 1) healing issue such as chronic inflammation or low grade infection or 2) mechanical obstruction (such as a ridge of cartilage in the septum that creates an area of accumulation of crust. You should have your surgeon examine your nose

Sometimes people get redness and crusting from a runny nose after surgery. Consider trying OTC hydrocortisone 1% cream with a QTip, and this may go away. Hope this helps! Dr Joseph

The area may be an area of slight depression now which an incision was made and thus susceptible to collection of moisture and mucus.
Discuss your concerns with your nasal surgeon for a detailed examination and explanation of this issue. In the meantime, keep it moist with saline-based sprays and gels to minimize this for you.