Common mechanisms
Examples include ear-canal blockage, middle-ear fluid, a perforated eardrum, pressure problems, fixation or interruption of the ossicles and structural differences present from birth. The likely cause changes with age, symptoms, otoscopy and test results.
What testing may show
Air-conduction thresholds may be poorer than bone-conduction thresholds, creating an air–bone gap. Tympanometry can add information about middle-ear mobility and pressure. Speech results and acoustic reflexes may help define the pattern. No one graph identifies every cause.
A worked example
An adult notices muffled hearing after an upper-respiratory illness. Otoscopy and a flat tympanogram with an expected ear-canal volume may support middle-ear fluid, while bone thresholds remain better than air thresholds. Another person with a flat tracing and a large volume may have a different explanation. The clinician combines the evidence before recommending next steps.
Treatment and limitations
Treatment is cause-specific. Some problems resolve, some need medical or surgical management, and some are addressed with hearing technology. Do not place drops or objects in the ear based only on an online description. A hearing aid can improve access in some conductive or mixed losses, but candidacy depends on anatomy, stability, medical evaluation and individual goals.
When to seek prompt care
Prompt evaluation is important for a sudden change, significant pain, drainage, trauma, a foreign object, new one-sided symptoms or marked dizziness. For a gradual change, schedule a hearing evaluation and bring a list of medications, noise exposure and the situations that are difficult.
What a follow-up plan may include
A follow-up plan can include repeat otoscopy, tympanometry, air- and bone-conduction thresholds, a medical examination or monitoring after an illness. The interval depends on symptoms, age, cause and professional judgment. If treatment changes the conductive component, testing can show whether an air–bone gap closes and whether another component remains.
For work or school, temporary access still matters while the cause is being evaluated. Preferential seating, captions, a remote microphone or written confirmation can reduce the communication impact without assuming the condition is permanent.
Sources and review notes
Sources were checked for this editorial update on September 26, 2026. External guidance can change; follow the linked source for the current version.
This page provides education, not an individual diagnosis, treatment plan, legal opinion or billing decision. Historical expert contribution is credited only where supported by the original project record; it does not imply review of this update.
