Hello @sevenwoods, Welcome to Mayo Clinic Connect. I wasn't familiar with coat hanger pain but did find a YouTube video that might provide some helpful information.

@sevenwoods You might try doing vagus nerve resetting exercises to help your neck pain. You have 2 vagus nerves running through your neck, and exercises for them may help. Go to youtube for vagus nerve resetting videos. I think a lady named Suki Baxter does them. LoriRenee1

sevenwoods, chronic coat hanger pain is a type of dysautonomia that may result from a thiamine deficiency.. Thiamine is intimantly involved with the autonomic system and the vagus nerve. Thiamine requires magnesium to become bioactive. Please use these links as a starting point
http://www.hormonesmatter.com/thiamine-deficiency-causes-problems/
https://www.eonutrition.co.uk/post/thiamine-deficiency-a-major-cause-of-sibo
https://nootropicsexpert.com/vitamin-b1-thiamine/
https://www.krispin.com/magnes.html