What causes a runny nose, exactly?
Anything that irritates the inside of the nose can cause a runny nose. Infections — such as colds, flu or sinusitis — and allergies often cause runny and stuffy noses. Some people have noses that run all the time without a known reason. When your nose starts running, your first thought may be that you’ve got the common cold. But if that runny nose persists despite no other symptoms appearing, it’s a pretty clear sign that you aren’t sick.Anything that irritates the inside of the nose can cause a runny nose. Infections — such as colds, flu or sinusitis — and allergies often cause runny and stuffy noses. Some people have noses that run all the time without a known reason. This is called nonallergic rhinitis or vasomotor rhinitis.
What deficiency causes a stuffy nose?
The Link Between Low Vitamin D and Sinus Problems For example, one study found that patients with lower vitamin D levels not only had more nasal polyps on their scans but also experienced more frequent symptoms like facial pressure, congestion, and fatigue. Recent research suggests vitamin D may play an important role in the health of the sinuses and the entire ear, nose, and throat (ENT) system. When vitamin D levels drop, many individuals notice an increase in sinus infections, nasal congestion, allergies, and other ENT-related symptoms.