Allergic rhinitis, commonly known as hay fever, is an allergic reaction that occurs when the immune system overreacts to allergens in the air, such as pollen, dust mites, or pet dander. Symptoms often include sneezing, runny or stuffy nose, itchy eyes, and throat irritation. This condition can be seasonal, triggered by specific allergens like pollen during certain times of the year, or perennial, occurring year-round due to indoor allergens. The diagnosis of allergic rhinitis typically involves a medical history review and may include allergy testing to identify specific triggers. Treatment options include avoiding allergens, using over-the-counter medications like antihistamines, and in some cases, receiving immunotherapy to help reduce sensitivity to allergens.