Allergic rhinitis is an allergic reaction to tiny particles in the air called allergens. When you breathe in allergens through your nose or mouth, your body reacts by releasing a natural chemical called histamine. The following are common allergens that can cause allergic rhinitis:

• Pollen from trees, grasses, and weeds (hay fever)
• Dust mites
• Pet hair or dander
• Cockroaches
• Mold and fungi spores

Allergic rhinitis can also be caused by irritants such as cigarette smoke, perfumes, cleaning products, and other strong odors. It is important to note that not all rhinitis is allergic, and inflammation causes rhinitis, not allergens or histamine release.

Symptoms of allergic rhinitis include sneezing, nasal congestion, and irritation of your nose, throat, mouth, and eyes. These symptoms usually start within minutes of coming into contact with something youre allergic to. Allergic rhinitis can lead to complications in some cases, such as sinusitis, ear infections, and worsening of asthma.

If you have allergic rhinitis, your immune system reacts to an allergen as if it were harmful, resulting in cells releasing a number of chemicals that cause the inside layer of your nose to become swollen and excessive levels of mucus to be produced. Treatments for allergic rhinitis include antihistamines, nasal corticosteroids, decongestants, and immunotherapy (allergy shots). It is also recommended to avoid allergens as much as possible and to take steps to reduce exposure to them, such as using air filters and washing bedding regularly.