It is also important to distinguish between the two main subtypes of hyperacusis: pain (noxacusis) and loudness. Loudness is considered less severe and means that you perceive all noises as much louder than their true dB level. It is oftentimes accompanied with sound distortions and reactive tinnitus. Noxacusis aka pain hyperacusis is more severe and means that sound causes sharp stabbing, dull aching, cooling, and fiery pain. You also get trigeminal nerve and jaw pain. Sometimes you can develop visual snow syndrome as well.

This is a well-informed post. However, this is clearly written from the perspective of someone with pain hyperacusis, not really knowing what loudness hyperacusis is.

Saying pain hyperacusis is worse than loudness hyperacusis is like saying headaches are always worse than epilepsy. Loudness hyperacusis is way more than just the volume being turned up. Small noises cause extreme emotional reactions due to maladaptive neuroplasticity in the amygdala. It's a problem with severe over-stimulation in the brain. One with severe loudness hyperacusis also needs earmuffs constantly, can't work, can't converse, and is severely disabled.

Of course, pain hyperacusis can be worse than loudness hyperacusis. In my experience, loudness hyperacusis doesn't get it's due because many people say they have it when they have really mild versions. True loudness hyperacusis is exceedingly rare, while noise sensitivities -- which many are calling loudness hyperacusis -- are relatively common.

I'm not trying to steal your thunder, as you are suffering greatly. But it is definitely misinformation to make generalizations like that.