Eczema of the external auditory canal can be categorized into acute eczema, subacute eczema and chronic eczema, and the symptoms of different types of lesions are similar, with itching, pain and oozing as the main symptoms. The etiology and pathogenesis of eczema are still not very clear, and may be related to allergic reactions, psychiatric factors, neurological dysfunction, endocrine disorders, metabolic disorders, dyspepsia and so on. Woolen fabrics, fish, shrimp, milk and focal infections are possible allergens, and humidity and high temperature can be triggers. Chronic otitis media pus, high temperature and chemical stimulation and other factors can also cause disease. 1.acute eczema local itching, often accompanied by burning sensation, infants and young children can not tell, can show a variety of itching action, restlessness, can not sleep. If secondary infection occurs, it will feel pain and increase body temperature. If the lesions involve the deep skin of the external auditory canal and the surface of the tympanic membrane, there may be tinnitus and mild conductive deafness. 2. Subacute eczema is often caused by prolonged acute eczema. Localized itching, but the symptoms are lighter than acute eczema, redness, swelling and oozing is not dramatic, scales and crusts can appear. 3. Chronic eczema is often due to acute, subacute eczema recurrence or untreated development. The performance of the external auditory canal skin thickening, roughness, epidermal cracking, mossy changes, flaking and hyperpigmentation. Self-consciousness severe itching, often repeated acute episodes. If ear discomfort occurs, it is recommended to actively consult a doctor for systematic examination and clear diagnosis.