A blocked nose, or nasal congestion, is a common symptom of several allergies. The most frequent culprit is allergic rhinitis, also known as hay fever.
Allergic Rhinitis and Nasal Congestion
Allergic rhinitis is an allergic reaction causing inflammation in the nasal passages. This inflammation leads to a stuffy nose. Common allergens triggering this reaction include:
- Pollen: From trees, grasses, and weeds.
- Dust mites: Microscopic creatures found in bedding and carpets.
- Mold: Fungi growing in damp environments.
- Pet dander: Tiny flakes of skin shed by animals, particularly cats and dogs.
These allergens irritate the nasal lining, causing the blood vessels to swell and resulting in a blocked nose. Other symptoms often accompany a stuffy nose, such as sneezing, itchy eyes, and runny nose. The severity of symptoms varies depending on the allergen and the individual's sensitivity.
Other Allergic Reactions Causing Nasal Congestion
While allergic rhinitis is the most common cause, other allergies can also lead to a blocked nose. For instance, reactions to certain foods or medications may present with nasal congestion as one of the symptoms. However, it's crucial to note that a stuffy nose alone doesn't definitively indicate an allergy. Other conditions, like the common cold or nasal polyps, can also cause this symptom.
The information provided above is based on multiple sources, including the NHS, Cleveland Clinic, and various medical encyclopedias and websites detailing allergic rhinitis and its symptoms. These sources consistently identify pollen, dust mites, mold, and pet dander as significant allergens responsible for nasal congestion as a part of allergic rhinitis.
