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.
Perennial allergic rhinitis is caused by allergies to substances that are present year round. The chief causes of this type of rhinitis are allergies to dust mites, mold, animal dander and cockroach debris. Nonallergic rhinitis. Sometimes perennial rhinitis is not caused by allergic triggers.