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.
Seasonal allergic rhinitis is the medical term for hay fever. Rhinitis means inflammation of the inside of the nose. Some people also experience hay fever-like symptoms when exposed to other allergy-triggering substances, such as dust mites and animal fur. Read more about other types of allergic rhinitis.