Chronic urticaria is basically an allergic reaction caused by any food or medicine. Urticaria is an autoimmune disorder in which the immune system attacks the normal tissue of the body and causes hives. The symptoms may include itching, redness, rashes, angioedema or swelling of the face. , Whereas allergic rhinitis occurs due to swelling and inflammation in the nose. It is characterized by symptoms like stuffed or runny nose or seasonal allergies, watery eyes, sneezing etc.