AAO-HNS is the world's largest organization representing specialists who treat the ear, nose, throat, and related structures of the head and neck. The Academy represents otolaryngologist - head and neck surgeons who diagnose and treat disorders of the ears, nose, throat, and related structures of the head and neck. The medical disorders treated by this specialty are among the most common that afflict all Americans, young and old. They include chronic ear infection, sinusitis, snoring and sleep apnea, hearing loss, allergies and hay fever, swallowing disorders, nosebleeds, hoarseness, dizziness, and head and neck cancer. The AAO-HNS Foundation works to advance the art, science and ethical practice of otolaryngology - head and neck surgery through education, research, and lifelong learning.