I have had Chronic Regional Pain Syndrome for 5 years that began in my right foot, but has spread to other areas in my body. This year I was diagnosed with sleep apnea and began to use a CPAP machine. When using the machine, I am finding that I wake up in the middle of the night with my whole body on fire–from my brain to my toes. It is like all my nerves are on alert and on fire. I will be seeing my sleep doctor next month, but don’t think she has had a patient with CRPS before. Has anyone else experienced anything like this?? So hard to understand what is happening to my body.