Arm pain, who to see?

My DP has had a pain in his upper arm for a few weeks now. It's not getting any better with time. He has always suffered fom neck and back pain and I am wondering if the pain in his arm may be a result of his neck/back being out.
My question is, who doe she see? I just called the Oseo but they have no appointments til the 14th. Would a GP be of any help?

you GP will probably just prescribe an antiinflammatory cream or pills and not be much help.
A chiro may hep though

Why dont you try a Myotherapist?
they are more likely to help try and find the root of the pain and then suggest additional treatment if it is not something they can fix (skeletal/disc)
My sister is a Myo and she uses acupucture, massage, crainosacral etc etc.... to treat her patients.
Most Myo's are claimable on PH if you have it

i would suggest chiro or myotherapist

my upper arms hurt when my back is out

maybe deep tissue masseuse

or physio.