- Otalgia, classified as primary or secondary, means ear pain or an earache.
- Primary (or otogenic) otalgia is ear pain that originates inside the ear, either from the external auditory canal or from the middle ear structures.
- Secondary (or referred) otalgia is ear pain that originates from outside of the ear. Any anatomic area that shares innervation with the ear can be the primary source of perceived ear pain.
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