Just Wake Up And Every Night I Have These Pains

just wake up and every night I have these pains in my arms like a spasm that I need to put some cream to make it painless.During the day while I work and move it is not so noticed for some reasons.I can move the arms and the shoulder quite well so does n
t look it is a shoulder problem .I did a few sessions of physio but still no improvement.My enigma is why during the night and not when I go to bed but after a few ours of sleep around 1pm I woke up with the pain.Thanks Florin