A wax check can answer one question, not every question
Tinnitus is the perception of sound without an outside source. It may come and go or be persistent, and it can occur with hearing loss or independently. An ear examination can identify whether earwax is present and whether it may need removing so the ear can be examined properly. It is not a full tinnitus or hearing assessment. NICE tinnitus guidance recommends appropriate audiological assessment for people with tinnitus.
Research does not support treating earwax as a general explanation for tinnitus. In a large population study, partial and complete cerumen impaction were not associated with tinnitus after adjustment for other factors. [4] That does not decide an individual situation, but it is a reason to avoid assumptions or promises about what wax removal will do.
The practical next step
If there are no warning features and you also have a blocked feeling or a hearing change, an ear health assessment and otoscopy can check whether wax is present. The result guides the next step; it does not diagnose the cause of tinnitus.