1 This condition is an inflammation of the smallest blood vessels (capillaries) of your skin, joints, bowel and kidneys. 2  Signs and symptoms include abdominal pain, blood in the urine, joint pain, and a rash on your buttocks or lower legs.
Description. Allergic rhinitis (AR) is the most common allergic condition and one of the most common of all minor afflictions. It affects between 10-20% of all people in the United States, and is responsible for 2.5% of all doctor visits.
Unlike allergic rhinitis, nonallergic rhinitis does not involve the immune system. About 58 million Americans have allergic rhinitis. By comparison, 19 million have nonallergic rhinitis. Nonallergic rhinitis can cause just as much misery as allergic rhinitis.