Itchy left ear may be a symptom of eczema of the external auditory canal, fungal otitis externa, suppurative otitis media, etc. You can’t tell which disease is the harbinger of an itchy ear. 1. Eczema of the external auditory canal: it usually manifests itself as a large amount of exudate, cracking of the skin, itching of the ear, and may be caused by allergy to certain substances. 2. Fungal otitis externa: the left side of the external ear canal is infected by fungus, which can cause itching and usually no running water. 3. Suppurative otitis media: due to the secretion of more purulent secretions, irritation of the ear canal and cause left ear itching accompanied by ear pain, hearing loss and other symptoms. Left ear itch, there may be other reasons, it is recommended to consult a doctor in a timely manner, to identify the cause of the standardized treatment as prescribed by the doctor.