Allergic rhinitis

Definition

Allergic rhinitis is an allergic reaction causing inflammation of the nasal passages, often due to allergens like pollen or dust. Symptoms include sneezing, nasal congestion, and itchy eyes.

5 Must Know Facts For Your Next Test

1. Allergic rhinitis is classified as a Type I hypersensitivity reaction.
2. IgE antibodies play a crucial role in the development of allergic rhinitis by binding to allergens and triggering histamine release.
3. Common triggers include pollen, dust mites, pet dander, and mold spores.
4. Treatment options typically involve antihistamines, decongestants, and corticosteroids.
5. Allergic rhinitis can be seasonal (hay fever) or perennial (year-round).

Review Questions

• What type of hypersensitivity reaction is allergic rhinitis?
• Which antibody is primarily involved in allergic rhinitis?
• Name at least two common triggers for allergic rhinitis.

Related terms

Hypersensitivity:

An exaggerated immune response to a foreign substance.

Type I Hypersensitivity: An immediate allergic reaction involving IgE antibodies.

Histamine:

A compound released by mast cells during an allergic reaction that causes symptoms like itching and swelling.