Hi,
This could be due to a bad sleeping posture, a hard mattress or a large pillow. You should try some local application diclofenac gel and exercises till you feel good again. Also try to get a soft mattress and a thin pillow. Consult a physiotherapist and also ask your orthopedician if any tests need to be done.
Hi,
Since when is this happening?
Also do you have any other symtoms during the day?