Allergic rhinitis is a condition that occurs when the body's immune system overreacts to certain allergens in the environment. These allergens can include things like pollen, mold, dust mites, and pet dander. When an individual is exposed to these allergens, their immune system releases histamine, which causes symptoms such as a runny nose, sneezing, itching, and even watery eyes. There are several different triggers that can cause allergic rhinitis. The most common triggers include pollen from trees, grasses, and weeds, as well as mold spores. Dust mites and pet dander can also trigger allergic rhinitis, as can certain foods and medications. Some people may also experience allergic rhinitis as a result of exposure to smoke, perfumes, and other chemicals. Another trigger for allergic rhinitis is indoor allergens such as dust mites, pets, and mold. Dust mites thrive in warm and humid environments, making them common in bedding, carpets, and upholstery. Pets, like cats and dogs, can also cause allergic reactions in people who are sensitive to their dander, urine, and saliva. Mold can grow in damp places such as bathrooms, basements, and kitchens. Individuals with a family history of allergies or asthma may be more likely to develop allergic rhinitis. Additionally, certain genetic variations have been found to be associated with an increased risk of developing the condition. It's important to note that while certain triggers may increase the risk of developing allergic rhinitis, exposure to these triggers alone is not always enough to cause the condition. Factors such as stress, hormonal changes, and exposure to certain chemicals can also contribute to the development of allergic rhinitis.