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.
Allergic rhinitis. Rhinitis caused by an allergic reaction may be either seasonalâoccurring only at certain times of the yearâor perennialâoccurring year round. Seasonal allergic rhinitis is sometimes called hay fever.. It is an allergic reaction to pollen from trees and grasses.