Sleeping with your arms raised is not a good and correct sleeping position. Raising the upper limbs while sleeping can cause pressure on the tissues in the armpits, including the brachial plexus nerves and the arteries and veins in the upper limbs, resulting in abnormal blood circulation or nerve compression, which can lead to swelling or numbness in the upper limbs in the morning. Sleeping with your arms raised will lead to tension in the muscles of the chest, shoulders, back and neck, and sleeping for a longer period of time will cause the muscles to be in a constant state of tension, which will lead to chronic muscle strain and inflammation of the fascia, and the inflammation of the muscles will also lead to the symptom of soreness of the upper limbs, including the chest, back, or neck are uncomfortable. So holding up your arms to sleep is not a good and correct sleeping position.