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.
Persistent allergic rhinitis. The most common cause of persistent rhinitis is an allergy to the house dust mite. However, allergy to pets or other animals is also common. Note: the thing that causes an allergy (house dust mite, dead animal skin, etc) is often known as the allergen.