Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Use emergency services after a blast or head injury if there is severe bleeding, clear fluid from the ear, loss of consciousness, confusion, new facial weakness, severe trouble walking, or other possible stroke symptoms.
Contact a healthcare professional promptly if hearing loss mainly affects one ear, is getting worse quickly, or occurs with ongoing ear pain, discharge, dizziness, or balance problems.
Seek urgent, same-day medical care for sudden hearing loss in one or both ears, especially if it develops over hours or a few days.
Sudden inner-ear hearing loss can feel like blockage or pressure and may occur with tinnitus or dizziness.
Early assessment is important.
Arrange a routine hearing assessment if you gradually notice difficulty understanding speech, need more volume, develop ongoing tinnitus, or have repeated dull hearing after noisy shifts.
You should also seek assessment if a workplace hearing test shows a significant change.
Every sign above is quoted from the sofidex article on Occupational hearing loss. If you are not sure, err upward — it is always reasonable to be checked.