I've always thought there is no cure for this condition and it's only manageable. However, the author Daniel Pecaut appears to think differently.
It makes for interesting reading, and he stated he is only sharing his personal experience and not medical advice.
To condense: He visits The Mayo Clinic, also has many allergies, and his recovery includes a plethora of various treatments.
He is a wealthy American businessman who obviously can afford all the treatments but the one thing I found of real interest was the method of breathing devised by a Russian doctor, Konstantin Buteyko in the 1920's originally to help athsma [Edited]. There are lots of books on Buteyko Breathing and I've now viewed demonstrations on YouTube. There are also classes throughout the UK but are very expensive.
Basically you breathe out more than you breathe in, keeping mouth closed and always breathing through nose (edit - and so raise CO2 levels). I tried this and found it way more difficult than you would think. I intend to keep trying though.
So just wondered if anyone had heard of this or tried it with a degree of success.