Definition of scholar for Students. 1  1 : a student in a school : pupil. 2  2 : a person who knows a great deal about one or more subjects : a learned person.
Allergic rhinitis, or hay fever, is swelling of the inside of your nose. The swelling is a reaction to allergens in the air. An allergen can be anything that causes an allergic reaction. Allergies to weeds, grass, trees, or mold often cause seasonal allergic rhinitis. Indoor dust mites, cockroaches, pet dander, or mold can also cause allergic rhinitis.
How Allergies Cause Sinusitis If you have allergies, your body is reacting to allergens in the environment. When the allergen comes into contact with immune cells (mast cells) in your nose and sinuses, histamine is released.