Anvil ear is a medical term used to describe a condition in which the INCUS, a BONE in the middle ear, becomes displaced and presses against the eardrum. This condition is also known as incudostapedial dislocation or incudostapedial subluxation. The INCUS is connected to the malleus and stapes, two other bones in the middle ear, and when it is displaced, it can cause hearing loss, tinnitus, and dizziness. Treatment for anvil ear typically involves repositioning the INCUS back into its proper position.