In short, the breathing increases epinephrine (adrenaline), which causes a spike in anti-inflammatory cytokines, and decreases inflammatory cytokines such as TNF-a.
It should be added that on the web I found several reports about increased tinnitus symptoms, which usually subside after the breathing is stopped, but for some it was permanent. This is why I am not doing it regularly, as I also get some ringing, but thankfully it was not permanent.
Nevertheless, I find this very method very exciting. I am glad Radboud took a look into it. However, I would love to see clinical trials on the method at last.
> “pushing in the brain” means creating high pressure in the lungs until you feel it in your head. Do NOT push the air literaly into the airways in your head, that will cause tinnitus