Side sleep arm numbness, this is in the side sleep when the compression of the brachial plexus nerve, resulting in nerve conduction by the obstacle, a longer time will cause arm numbness. Therefore, patients with this situation should change the sleeping position, do not sleep on the side again, can choose to sleep in the supine position or prone position, so as to avoid nerve compression, so as not to appear arm numbness phenomenon. If the numbness of the arm lasts for a long time, you need to go to the hospital for examination, and if it is a persistent nerve compression, you need to undergo surgery.