Post-nasal drip starts in your sinuses, and clearing those out with a sinus rinse can help ease up the onslaught, Dr. Parikh says. 10. Cystic fibrosis is one of the conditions that may predispose a person to developing nasal polyps. The alternating congestion gives the mucous and cilia (the tiny hairs up in your nose) in each nostril a well-deserved break from the onslaught of … This condition is called nonallergic rhinitis or vasomotor rhinitis. One nostril only ever gets blocked at a time (Image: Alan Thornton / Getty Images) Dr Karl explained it all on his Triplej radio show after a … Chronic congestion in children If caused by a deviated septum or obstruction, then the same nostril will always be affected. It is quite common for people to complain of having a blocked nose on one side. This symptom can be similar to the symptoms of a common cold. Deviated septum refers to when this tissue is displaced to one side, restricting the flow of oxygen there and causing the feeling of congestion. Less commonly, nasal congestion can be caused by a tumor. Large nasal polyps can block a person's nostril. A nasal polyp is noncancerous, sac-like over-growth of swollen tissue lining the nose or sinuses that can obstruct the nasal airway. This deviation may be present from birth or arises with some injury to the nose during the course of life. Not all people with a deviated septum have a constantly blocked nose. The most common cause of a persistent blocked nose on one side would be that the nasal bone or septum is deviated internally to that side. The obstruction is also likely to result in swelling of nasal tissue which also leads to congestion. One of the most common reasons a person's nostril can be blocked is because of nasal polyps, which are characterized by the growth of tissues in the sinuses and nasal passages. As a result one nasal passage is smaller than the other. Growths It’s likely that one nostril will always feel more stuffed up than the other when you’re sick. ️Use a saline nasal rinse. The nasal septum is a thin wall of tissue that separates each nostril. Still, after about 90 minutes to 4 hours, your … Potential causes of nasal congestion include: Medications, such as those used to treat high blood pressure, erectile dysfunction, depression, seizures and other conditions. It may only become blocked during a nasal infection or with an allergy. People who have Samter’s Triad suffer from severe asthma accompanied by nasal polyps. If this is caused by an infection or allergies, then it is quite common for the blocked nostril to switch sides. Other conditions include asthma and sensitivity to aspirin that, together with nasal polyps, form Samter’s Triad, also known as aspirin exacerbated respiratory disease. 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