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.
See the entire definition of Allergic reaction. Allergic rhinitis: Medical term for hay fever, an allergic reaction that mimics a chronic ... Allergy: A misguided reaction to foreign substances by the immune system, the body system ... Allergy shots: See Allergy desensitization.