The ear is always itchy, may be related to the external auditory canal eczema, external auditory canal fungal disease, chronic otitis externa. 1. Eczema of the external auditory canal: eczema of the external auditory canal is the main cause of itchy ears, is a variety of internal and external factors leading to the external auditory canal of the allergic reaction polymorphic dermatitis, more than the performance of the external ear itchy, local oozing or chapped skin. 2. External auditory canal dermatomycosis: the fungus invades the external auditory canal or the condition of the external auditory canal causative organisms reproduces under the appropriate conditions, caused by the inflammatory lesions of the external auditory canal. Performance of the external auditory canal discomfort, swelling and pain or itching, blocking the external auditory canal and the sense of blockage. 3. Chronic otitis externa; extensive chronic inflammation of the skin or subcutaneous tissue of the external auditory canal, often making the patient feel itchy ear discomfort, from time to time there is secretion outflow. Therefore, the ear always itchy to hospital, diagnosis and treatment.