Hi Lara
I have this happen to me in my upper back alot -around my shoulder blades!
I have to take flexeril for it.Once i take that for a few days then it
eases up.As to what causes it?Well i dont know!
I have often used that term "feeling like a truck ran me over"
Thats how i feel when i get out of bed every morning.
When i started telling the doctors..thats when they started to examine me for fibro!I also have arthritis.
I would suggest you make an appt with a rhuematologist{sp?}
I am so sorry your having to deal with such pain everyday and sure
I do hope you can get some answers soon.
In the meantime you could try taking hot baths to relax the muscles .
Let me know when you find out something..ok?
Take care.
~Kell