It helps to filter and humidify the air that we breathe.
The nasal conchae (plural of concha) are also sometimes called turbinates.
They are often described as being “spongy” bones.

Layla Bird / Getty Images
The nasal conchae are able to accomplish this by increasing the surface area of the nasal cavities.
Additionally, these bones are lined with mucous membranes containing cilia.
The blood vessels lining the inferior nasal concha warm and humidify the air before it reaches the lungs.
Some people may be born with large nasal concha.
They should not be used more than three days in a row, however, to avoidrebound congestion.
Oral decongestants such as pseudoephedrine may be better options if decongestants need to be used longer than three days.
Treatment of allergies may include the use of decongestants, trigger avoidance, antihistamines, orimmunotherapy.
The procedure is usually performed using an endoscope.
The surgeon goes in through the nostrils so no external incision needs to be made.
These may include the use of cryosurgery, radiofrequency ablation, or superficial thermal ablation.
It is also common to have a bloody nose for a few days.
You should take care to follow these instructions precisely.
Georgakopoulos B, Le PH.Anatomy, head and neck, nose interior nasal concha.
Smith DH, Brook CD, Virani S, Platt MP.The inferior turbinate: An autonomic organ.Am J Otolaryngol.
Critical review of the literature by a medical panel.Eur Ann Otorhinolaryngol Head Neck Dis.
2015;14:Doc08.
doi:10.3205/cto000123
Scheithauer MO.Surgery of the turbinates and “empty nose” syndrome.GMS Curr Top Otorhinolaryngol Head Neck Surg.
2010;9:Doc03.
doi:10.3205/cto000067
Inferior Nasal Concha.
Turbinate Dysfunction and Treatment.