There are a wide variety of conditions and causes which can lead to inflammation of the ear (otitis) in cats. Starting from ear mites, allergies, fungi, bacteria, cancer, injuries, immune system nuisance, etc. are the causing of ear infections. In general, the ear is divided into three parts, the outer (external), the middle and the (internal). It can occur in one or all three parts of the ear. The infection that occurs in the inner ears is usually severe and fatal, can cause loss of hearing ability permanently. Otitis which is not treated quickly and properly can cause longstanding inflammation/chronic.