I wish you every success with the Philadelphia collar (heaven knows we need it!!) I did find that it cleared the occipital (back of head) pain, that I used to wake up with, straight away. I do have to sleep sitting up though as, even with the collar on, things start to go wrong if I’m horizontal for any length of time (as explained in Dr Diana’s Theory, part 2).
The annoying neck and shoulder pain that used to come and go (often) throughout the day, for which I seemed to be persistently wearing a ‘hot wheat bag’, went too. The arrhythmia’s (irregular heartbeats) calmed down, so did the fasciculations (wriggling and twitching under the skin) which weren’t as prolonged, as often, or as intense after wearing the collar – I did have to wear it 24 hours a day though. It appears very cumbersome at first but, for the long-term comfort it brings, it’s absolutely worth it, no contest!