Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
And for anyone, someone who:
Contact the care team promptly for a noticeable change in hearing, new persistent facial symptoms, worsening balance, repeated falls, new weakness or numbness, or headaches that are becoming more frequent.
These symptoms do not always mean a tumor has grown, but they deserve assessment.
And for anyone, someone who:
Follow-up is usually long term.
Visits may include MRI, hearing and speech-understanding tests, balance assessment, neurologic examination, and review of new symptoms.
People with NF2-related schwannomatosis may also need periodic spinal imaging, eye examinations, and monitoring for peripheral nerve problems.[3,5]
The article also says
The timing of scans and tests is not the same for everyone.
It depends on age, tumor growth, symptoms, treatment history, and the other findings present.
After surgery, radiation, or medicine treatment, the schedule may change.
Genetic counseling may also be offered to relatives.
Whether a relative needs genetic testing or clinical screening depends on the affected person's test results and family history.
Every sign above is quoted from the sofidex article on Bilateral acoustic neuroma. If you are not sure, err upward — it is always reasonable to be checked.