I'm curious if what I have is PET.
I've been dealing with this for almost 8 years. I've even seen an ENT who had no clue. Anyway it happens to me when I physically push too far and sometimes I'm not sure what sets it off. I have chronic fatigue syndrome and psoriatic arthritis. It kinda works for me as a warning light. When it starts I need to go lay down and I'm not sure if hydrating helps or not but thats what I do while laying down. If I lie flat I instantly get relief and I don't hear my breathing and voice popping in and out like my ears are full of water but when I stand back up it comes back. As long as I'm not doing anything too active I'm fine except for if it's really hot outside it can come on quick. I almost feel it has something to do with an orthostatic intolerance because of the temporary relief I get laying down. Does this sound like PET?