Hi Sean, ((((( Smiles )))))

This is interesting too..
Plus as you already know, Lyme can cause hyperacusis as well.
Autoimmune Disease Treatment Center

Quote
Adults and children can develop hyperacusis: certain birth conditions are associated with hyperacusis, including Williams Syndrome and autism.
Since the auditory system connects the outer organs of hearing with the central nervous system, through a complex series of neural pathways,
that literally pass through or coordinate with many diverse areas of the brain, there are endless possibilities for dysfunction that may contribute to hyperacusis.
In other words, diagnosis is often extremely challenging and difficult to specifically locate a single structural change that is responsible for hyperacusis.



http://www.cidpusa.org/hyperacusis.htm

Try To Stay Well, (((( Smiles )))
Lynn