Hi I read your post and as i had not heard about it I googled it also but could only find it associated with the face. It appears to be connected with Fibromyalgia but I couldn't say for sure. So sorry not to be of more help and hope that whatever it is the treatment for you will make life more bearable.
I have done the googling too. As with everyone, I am guessing. Arthro means joint and myalgia is muscle pain. So basically it's describing your joint and muscle pain. If you split the likes of like poly myalgia rheumatica, that simply means muscle pain around more than one (poly) joint. It's not much help to you tho, sorry x
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.