Pain in the lower back of the neck may be caused by bad habits, cervical spondylosis, falling pillow and other reasons. 1. Bad habits: in daily life, such as sitting at a desk for a long time, playing with a cell phone with the head down, and keeping the neck in a position that does not move, etc., can lead to local muscle strains or injuries, which can lead to the phenomenon of pain under the back of the neck. 2. Cervical spondylosis: caused by cervical degeneration, chronic wear and tear, the soft tissues of the neck and the vertebrae dynamic and static force balance imbalance, which can produce hyperplasia, protrusion and other phenomena, compression of the nerves can appear after the lower back of the neck pain symptoms. 3. Falling pillow: mainly due to poor posture during sleep, improper pillow height caused by some of the neck muscle spasm. Neck muscle stiffness in the morning, pain in the lower back of the neck, restricted movement and other symptoms. Pain under the back of the neck may also be caused by other reasons, such as neck myofasciitis, it is recommended to go to the hospital in a timely manner, under the guidance of the doctor for treatment, to avoid delaying the condition.