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Otalgia or an earache or ear pain is pain in the ear. Primary otalgia is ear pain that originates inside the ear. Referred otalgia is ear pain that originates from outside the ear. Otalgia is not always associated with ear disease. It may be caused by several other conditions, such as impacted teeth, sinus disease, inflamed tonsils, infections in the nose and pharynx, throat cancer, and occasionally as a sensory aura that precedes a migraine. ==Primary otalgia== Ear pain can be caused by disease in the external, middle, or inner ear, but the three are indistinguishable in terms of the pain experienced. External ear pain may be: * Mechanical: trauma, foreign bodies such as hairs, insects or cotton buds. * Infective (otitis externa): ''Staphylococcus'', ''Pseudomonas'', ''Candida'', herpes zoster, or viral Myringitis. (See Otitis externa) Middle ear pain may be: * Mechanical: barotrauma (often iatrogenic), Eustachian tube obstruction leading to acute otitis media. * Inflammatory / infective: acute otitis media, mastoiditis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ear pain」の詳細全文を読む スポンサード リンク
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