Stretching exercises encourage lengthening of your muscles and associated tendons. Short and tight muscles can lead to pressure on nerves and pain. By its effect of lengthening muscles, stretching promotes flexibility and full range of motion about your joints.
Cross your right arm in front of your chest
Keeping your right arm parallel to the ground
Use left hand to push right elbow gently toward your left shoulder
Feel the stretch in the muscle behind the arm and the back of the shoulders
Repeat for opposite shoulder