The outer contour of the ear is always itchy, and the common ones are eczema of the outer ear, otitis externa, dermatophytosis and so on. 1. eczema: a chronic itchy skin disease, if it occurs in the outer contour of the ear, manifested in the lesion area obvious itching, rash and other symptoms. 2. otitis externa: extensive acute or chronic inflammatory infection of the skin and subcutaneous tissues of the external auditory canal, acute cases may have oedema of the skin of the external auditory canal, pain, desquamation, etc. If the condition is prolonged, it may become chronic, mainly manifested as itching of the ear, and the stimulation of the ear canal by dampness or outflow of secretion leads to old itching of the external ear contour. 3. dermatophytosis: dermatophytes invade the skin of the external auricle caused by a group of fungal infectious diseases, which can be manifested as erythema, papules, often peeling, itching performance. The outer contour of the ear is always itchy, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to actively standardize the treatment.