[Nurse57]

I had it as a child and it went when I was about 12. It came back when I was about 28. It has put me in hospital twice in the past 8 years. One time they kept me in for 3 days after I walked myself to the hospital. They were surprised as "most people with that low level of oxygen in their blood would not be able to walk themselves in"

It is controllable if you keep up the drugs.