From my shoulder joint all the way down my left arm is agony. It feels like really bad muscle and joint pain.
Also my arm is really weak, i can even pick a kettle up!
Its been like it for months but is getting worse to the point it hurts all the time, and if i lay on it through the night i wake up in agony and its really stiff.

Anyone any idea what it could be? My mum mentioned a frozen shoulder but am not sure as although its stiff and i cant lift it all the way up, i can still move it xxx

My mums has had frozen shoulder twice, and both times had it un frozen under general - and what she had doesn't sound like that
Her pain was in the shoulder and she slowly lost the ability to move it

Get to the docs though cos its sounds nasty

Ya hun..gonna have to go with the frozen shoulder guess as well. Very painful! Or..other suggestion could be a pinched nerve in your back. I hope you are ok hun! xxx

Get to the quacks if you can tear yourself away from twighlight long enough

could be a nerve for it to go all the way down your arm.
or it could be RSI from holding your e-reader