What is hypertrophy of inferior nasal concha and concha bullosa?

Hypertrophy means overgrowth. The concha are the turbinates, or the ridged parts of the nose that swirl the air for warming and cleaning. Hypertrophy in the turbinates is typically a sign of rhinitis -- often due to Allergies. A concha bullosa is a turbinate with air in it; about half of people have one.