Hanging head upside down beside the bed has the following advantages: First, hanging head upside down helps to promote blood circulation and increase oxygen supply and nutrition to the head, thus improving brain function and attention. Secondly, head hanging upside down can relieve the pressure of cervical spine and spine, and relieve the pain and stiffness of neck and shoulder. In addition, head hanging upside down can also stretch the muscles of cervical spine and back, improve posture and enhance the flexibility and stability of spine. Generally speaking, head hanging upside down can improve the body circulation, relieve cervical problems and improve brain function.