Infections are often the common cause of itching inside ear. Bacteria or a virus may find several ways to enter your ear and cause itching. Given below are some of the causes of this condition. Dryness. Often, dryness in the ear is what causes inner ear itching. Some people produce very less sebum or earwax. This little amount is not adequate to keep the ear canal well lubricated. As a result, dryness occurs inside the ear, which gives rise to flaky skin in the interior of the ear.