Allergic asthma or allergic asthmatic bronchitis usually presents with a cough or breathlessness and wheezing (abnormal breathing sounds). Allergic asthma occurs from exposure to air-borne allergens. Inhalation of these allergens stimulate immune reactions which results in constriction of the bronchi, and increased mucus secretion. Iti s often associated with allergic rhinitis or other allergic disorders. Exposure to cold, smoke, dust, pollen, animal products (hair, scales) and pollen can precipitate the attack or worsen the symptoms.