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.
1. Allergies are one of the major causes of runny nose and coughing. An allergy happens when a person with an overactive immune system â that mistakes harmless substances such as pollen and dust for pathogens â gets exposed to those very substances (allergens).