Cervical pillow can sleep on the side, and cervical pillow has a very good shaping effect, in line with the normal physiological curvature of the human body, and with the human body’s structure is more consistent. Usually the middle of the pillow height is relatively low, to maintain the normal physiological curvature of the cervical vertebrae, when lying on the side the head level will be elevated, the pillow height will also be elevated, to keep the head, neck and torso in a straight line. Therefore, the cervical spine and the surrounding muscles, ligaments and other soft tissues can be effectively in the relaxation phase, which can increase the quality of sleep and help relieve fatigue and pain related to the cervical spine area and unfavorable activities. However, in the side position, if the collar is low or the quilt or clothing does not cover enough, it may cause the cervical spine area to get cold. So try to wear high-collared clothes when you sleep on your side at night, which can help keep the cervical spine area warm and avoid the accumulation of local inflammation that can lead to pain and unfavorable activity and other related conditions.