Itchy ear contour may be caused by external auditory canal eczema, atopic dermatitis, insect bite dermatitis and so on. 1. Eczema of the external auditory canal: it is allergic inflammation of the auricle, external auditory canal and surrounding skin. It is mainly characterized by itchy, polymorphic rashes, which are easy to recur. 2. Allergic dermatitis: caused by contact with allergens, such as hair dyes and other allergies, can lead to itching of the auricle, and there are local symptoms such as dry skin, peeling, red rash. 3. Insect bite dermatitis: the skin of the ear wheel is bitten by mosquitoes and other bites, localized itching, redness, swelling and other symptoms. Itchy ears may also be caused by diabetes and other factors, it is recommended that the hospital visit, diagnosis is clear and follow the doctor’s instructions for medication and treatment.