The common causes of itchy white flakes in the inner ear opening are external auditory canal eczema, otitis externa, and mycobacterial infection of the external auditory canal. 1. Eczema of the external auditory canal: mostly caused by allergen contact, manifested as itching, redness, swelling and white flakes in the external auditory canal. 2. Otitis externa: such as trauma, infection and physical and chemical factors stimulate in the resistance to decline, the external auditory canal appears corresponding inflammatory reaction, occurring as the title symptom. 3. Mold infection of the external auditory canal: this infection usually occurs in the deeper part of the external auditory canal, because the deeper part of the external auditory canal is more humid, it is easy to breed molds and produce such symptoms. The ear is an important organ of the human body, the ear canal disease need to go to the hospital for a clear diagnosis of the corresponding treatment, the use of medication must be carried out under the guidance of a doctor.