Upper back pain and spasms around ribs wake me up in early morning.goes away once i get up and start moving.there is a dull pain on my right side just under rib cage.no other symptoms.could this be cancer?

There is not enough information to get the answer you should. It is possible it is just muscle strain; but you have not be given the privilege of giving enough information to get the answer you need. I would suggest that you go for the televisit at the least, or get a more comprehensive evaluation with physical examination with imaging to help answer your question.