The one time revolutionary allergic approach to the management of many previously considered surgical problems in rhinology is an accepted fact in our specialty. Now, a similar plan of allergic therapy aimed not only at treating symptoms, but also at the fundamental cause of several acute and chronic disorders of the external, middle and internal ear is evolving.Allergic disease is most often found in such tissues as the skin and the mucous membranes of the respiratory and gastro-intestinal tracts since they are the principal contacts of the human organism with the substances of the environment. The embryological derivatives of those tissues are similarly but less frequently affected by the allergic reaction. The salivary glands, the pancreas and the nasal accessory sinuses are examples. The middle ear and eustachian tube lined by respiratory mucosa, and the membranous labyrinth in the internal ear derived from an infolding of the fetal ectoderm, are pertinent examples.Although the concept that allergic diseases do occur in the ear is not new, the general acceptance and recognition by the otologist of the frequency of allergic states in the ear is not as yet an accomplished fact. Several reasons exist for the failure to recognize allergic ear disease, as well as other allergic disorders. The most important reason is the lack of one accepted conclusive test to prove allergy. The finding of increased eosinophiles in secretions or tissues is strong presumptive evidence of an allergic reaction, but it is not conclusive evidence. Skin tests as a diagnostic measure can often be misleading and disappointing. The most reliable proof of an allergic etiology is the therapeutic test, but even this is not completely conclusive due to the tendency to spontaneous remissions in allergic conditions, particularly in acute ones. The long standing chronic diseases which are resistant to all other forms of treatment and which respond to allergic management should be considered as allergic in origin.