Experiencing numbness or tingling when you wake up can be uncomfortable. The most common reason for this is falling asleep with your arms above your head. Sleeping on your back with your arms above your head stretches the pectoralis major and minor, causing them to push on the nerves and blood vessels that run from the neck and trunk into your arms, which then fall asleep.
Completely change your sleeping position or try sleeping with your arms by your sides. Stretch the pectoralis major and minor every night before you go to bed.
Morning pain in the shoulder can be caused by sleeping with your arm under the pillow and your elbow above your head. Sleeping in this position squeezes the supraspinatus, which creates a feeling of weakness in the arm.
Try sleeping on your back or keeping your arm below the shoulder.
Sleeping on your front in a bed that is too soft commonly results in the feeling that your back is breaking in two.
This is because your midsection, which is your heaviest part of the body, sinks down into the bed, severely arching your back. This habit, combined with tight hip flexors, almost guarantees lower-back pain in the morning.
Switch to a firmer bed or place a board under the mattress. Stretch your hip flexors before you go to bed. Try sleeping on your side instead.