Mastoiditis is an inflammation of the mastoid process behind the ear and the air spaces connecting it to the middle ear cavity. It is usually caused by a middle ear infection but can also result from injuries, respiratory infections like rhinitis or sinusitis, or fractures near the ear. Symptoms include ear pain, swelling behind the ear, hearing loss, pain when eating, discharge from the ear, nausea, vomiting, and headaches. Diagnosis involves imaging tests and physical examination. Treatment consists of antibiotic and steroid ear drops, ear irrigation, analgesics, and sometimes mastoidectomy surgery to remove infected mastoid bone. Nursing care focuses on preventing infection, managing pain, addressing hearing and communication issues, and preventing trauma from