Does anyone know what this could be ? ?

Question

Yesterday my arm was slightly sore at the top between my shoulder and elbow. Then last night it got worse i couldn't straighten my arm and the pain got worse. now its ok as long as i dont try to straighten my arm if i do the pain is in my elbow and sometimes it shoots up my arm.

Answer 1

Did you sleep with your arm under your head or hanging over the side of the bed? Putting pressure on the arm like that for a long time will do exactly what you are describing. My leg does this every day when I am sitting at my desk for 3-4-5 hours at a time without shifting or fidgeting.

Answer 2

tennis elbow perhaps?