Earache can come from the ear itself or be referred from the throat, jaw, or teeth — the nerves that supply these areas share overlapping pathways. A proper diagnosis means examining the ear, the throat, and often the jaw joint before settling on a cause.
Pain that comes from within the ear (primary otalgia) usually has an obvious source on examination — fluid behind the drum, wax pressing on the wall, or inflammation of the canal.
Pain that is referred to the ear (secondary otalgia) has a normal-looking ear on examination. Common culprits are throat infections, dental problems, and temporomandibular joint dysfunction.
Pain that lasts more than 48 hours, fever above 38.5°C, swelling behind the ear, dizziness, or any drop in hearing warrants an ENT review. Babies and small children who are pulling at their ears should be seen promptly.