I haven’t been able to identify all my allergens. I have suspicions about xanthan gun or wood pulp, among others. I have had severe asthma attacks without any of my known alargens, and severe hives after taking benedryl, so I have raised the issue with doctors and have not been able to get a referal for a comprehensive allergy test.
My guess would be that that sort of background noise is relatively constant and is harder and harder to subtract/ignore and eventually and eventually becomes extremely painful even if it is only barely audible. But, you know, not everyone’s perceptions work the same way.
