The most important disease of the middle ear and mastoid are inflammations of various kinds and hearing loses. Tumors of the middle ear are rare. In this chapter we'l mainly discussed acute suppurative otitis media (ASOM)and chronic suppurative otitis media(CSOM) The most important disease of the middle ear and mastoid are inflammations of various kinds and hearing loses. Tumors of the middle ear are rare . In this chapter we'll mainly discussed acute suppurative otitis media (ASOM) and chronic suppurative otitis media (CSOM)