The way that I conquered this this last bout was to be told by an amazing massage therapist what exactly I was doing to my body.
When in stress, my shoulders are up about my ears. This pulls my ribcage up, out of place and cuts off my breathing.
The minute I learned this I started to get better. It was so logical and all made sense.
With her help I conquered this horrible thing. I've know people to have it for years and years, but they never look for a cure, only masking the pain with pharmaceuticals.
There is a real reason for costo. It's detective work.