The turbinates also go through a process which is known as the nasal cycle. This cycle is where one turbinate increases in size whilst the other decreases and then they swap over. This accounts for why people notice that they have a blocked nose on one side which then swaps to the other side.
Changes in Blood Flow When You Lie Down
Nasal congestion can worsen when you lie down. Lying down increases the blood flow to your head. The excess blood flow can cause the blood vessels in your nasal passage to swell. When the blood vessels in your nose become inflamed, your nose feels stuffy.
It is quite common for people to complain of having a blocked nose on one side. If this is caused by an infection or allergies, then it is quite common for the blocked nostril to switch sides. If caused by a deviated septum or obstruction, then the same nostril will always be affected.
Patients frequently complain that they have one side of their nose that is always blocked. This is typically due to structural issues in the nose. The nasal septum is the divider between the right and left side of your nose. It is made of cartilage and bone and it may be deviated into one side of the nose.
Increased blood flow. Lying down can increase blood flow to your upper body – including your face and nose.
Many factors can cause a blocked nose at night, including allergies; sinusitis; dry and dusty air; physical obstruction; pregnancy; viral infection; posture, and heartburn/acid reflux. Treatments that can help unblock the nose at night include using a nasal spray and drinking lots of water.
It's down to what's known as the 'nasal cycle'. We might not realise it, but our bodies deliberately direct the airflow more through one nostril than the other, switching between nostrils every few hours.
Deviated septum self-test
Use a finger to hold one of your nostrils closed. Breathe in, paying attention to how the air flows in and out of the open nostril. Is breathing through that nostril easy or does it seem like the airflow is blocked? Hold down your other nostril and repeat the breathing exercise.
This pattern happens when there is more blood flow to the structures inside the nose, such as the turbinates, which are the round masses that you may see if you look into the nostrils. Increased blood flow causes congestion in one nostril for about 3 to 6 hours before switching to the other side.
Nasal congestion typically clears after a few days, but congestion that lasts for a week or more may be a sign of an infection. Left untreated, nasal congestion may cause sinusitis, nasal polyps or middle ear infections.
Blowing the nose can worsen the feeling of congestion due to pressure build-up within the nostrils, which may shoot up the mucus into the sinuses instead of ejection through the nose.
It's likely that one nostril will always feel more stuffed up than the other when you're sick. Still, after about 90 minutes to 4 hours, your nose switches sides.
Many people with septal deviations find symptomatic relief via medications sufficient and don't require surgery. For that reason, treatment almost always begins with medical interventions. But for people who have major structural issues or those don't respond to medications, surgery likely is needed.
Fiber-optic nasal endoscopy is a diagnostic exam that provides a detailed view of the nasal passages. Doctors use endoscopy to determine the position of the septum and confirm whether any other structural damage or abnormalities contribute to obstructed breathing.
Prop Yourself Up With Pillows
According to Dr. Leann Poston of Invigor Medical, “Elevating your head before bed can increase drainage and decrease congestion.” That's why the best position to sleep with a stuffy nose is on your back with different types of pillows elevating your head and neck.
Blowing your nose to alleviate stuffiness may be second nature, but some people argue it does no good, reversing the flow of mucus into the sinuses and slowing the drainage. Counterintuitive, perhaps, but research shows it to be true.
Food to Avoid
Avoid dairy if you have had previous episodes of sinus infections. Also, try to avoid refined sugar as it is pro-inflammatory and increases the production of mucus. Other foods to avoid include tomatoes (contain histamines), chocolate, cheese, gluten, and fruits like bananas, which can cause congestion.