Ear itch is a sensation that occurs when the sensory nerves in the skin of the external ear canal are slightly irritated. Itchy ears are the main symptom of external ear canal skin disease, most often seen in eczema of the outer ear. Eczema is caused by irritation due to chemicals, ear-spotting medications or pus and sweat from ear boils and otitis media, and is also associated with allergic reactions in the body. In addition, ear mold can also cause itchy ears and can grow ear wax, often covering the entire outer ear canal in a week or two. The causes of ear mold can be environmental factors, secretions from broken eardrums and being infected. The outer ear canal runs into dirty water because of washing hair, rain, swimming, and long time without cleaning will have the opportunity to grow mold. If you have chronic otitis media and the pus flows from the hole in the middle ear to the outer ear canal without treatment, you will grow mold after a long time. People with athlete’s foot (ringworm) pick their feet with their fingers to stop the itch, and then use their fingers to dig into their ears without washing their hands, spreading the ringworm to the outer ear canal. When you go to a barber shop to get a haircut, you unfortunately use an unsterilized ear-extracting device and get infected with ear mold. There is also a case where you do not have an itchy ear, but you have developed a habit of pulling out your ears; when you have nothing to do, you want to pull out your ears with a matchstick, hairpin, etc. If you do not pull out your ears, you will feel itchy. This is a bad habit and should be stopped.