Why is one side of my nose always stuffy?
- Posted on: Aug 12 2026
Many people will experience a sensation that they breathe more easily from one side of the nose than the other. This is actually a natural phenomenon called the nasal cycle. The inside of the nasal cavity contains tissue called turbinates, whose function is to warm and filter inhaled air. Every two to six hours, the nervous system involuntarily directs blood to these turbinates on one side and reduces blood flow to the other. This causes one side of the nasal cavity to be more patent than the other. This process then repeats every few hours.
This cycle can also be noted when one is lying down – generally, the dependent (lower) side of the nose is more congested, and this can change with posture.
What is the purpose of the nasal cycle?
It is thought that the nasal cycle contributes to improved humidification of inhaled air. By directing air through one side, it gives the nasal lining on the congested side a chance to rest and recover before redirecting airflow to the other side.
There is also some thought that the nasal cycle plays a role in the ability to smell. The cell fibers that detect scent can react to the concentration of scent molecules in the air and how long they stay in the nose. Therefore, it is possible that the congested nostril, which has lower airflow, allows certain scent molecules to linger in the nose and be detected, and the more open nostril is able to detect more persistent odors. This expands the range of smells that are able to be detected.
What are other causes of a stuffy nose?
Though the nasal cycle is a normal process, there are several other reasons why nasal congestion can be persistent. These are listed below:
- Deviated nasal septum: The nasal septum is the wall of cartilage and bone that separates the right and left sides of the nasal cavity. A deviation means that this wall is bent and not sitting in the ideal midline fashion. This is a very common condition with some estimates concluding that this is present in 27% of infants and 80% of adults.
- Nasal polyps: These refer to abnormal soft tissue growth in the nasal cavity or sinuses. These can occur as a result of repeated or persistent sinus infections or severe allergies.
- Chronic sinus infections: The sinuses are air-filled cavities in the bones of the face and skull base that communicate with the nasal cavity. Infections of these spaces can result in chronic inflammation of the inside of the nose and cause restricted airflow.
- Allergies: People who have allergies will develop a runny nose, sneezing nasal congestion from inhalation of particles (called allergens) to which they have reactions. These can also decrease their ability to breathe through the nose.
Seeing an ENT provider at Sinus and Snoring Specialists can help you investigate the specific causes of nasal congestion and provide you with a plan to optimize your breathing and nasal health. Request an appointment or call/securely text us at 512-601-0303.
Tagged with: allergies, deviated septum, nasal, nasal polyps, septoplasty, stuffy nose, turbinate reduction
Posted in: Sinus and Nasal, Stuffy Nose
