Is nerve pain possible after FESS?

I had FESS and a septoplasty due to chronic sinusitis of over 1 year in my left maxillary sinus. 1 week after surgery I developed an infection and eye pain, but after 3 weeks of antibiotics the infection and eye pain went away for 1 week. Now I have constant dull pain in my sinus and eye, but the doctor thinks it is nerve pain due to a clear CT scan and physical exam of the sinuses. I’ve had nerve pain before and this isn’t sharp or shooting - could it really be nerves?