In general, the human body is bounded by the midline and is symmetrical on the left and right. When suffering from cervical spondylosis, the internal and external balance of the cervical spine is out of balance causing misalignment, so that the nerves and blood vessels of the head, face and brain are stimulated or compressed. With the loss of treatment, the skin, muscles and joints on both sides of the head and face are different because the vasoconstriction and diastole are different, the nutrition supply is naturally different, the joints and muscle movements are not coordinated, the amplitude of activities and the amount of movements are also different, and the size and muscle tension of the muscles are also different, so the symmetry is gradually lost. For example, the head is tilted to one side, the shoulders are high and low, the bridge of the nose is not vertical and skewed, and the nostrils are not equal in size; those who love to wear necklaces will find that the pendant on the necklace will be tilted to one side, or the chain will be tilted once when wearing a bead chain; one sleeve is long and one sleeve is short when wearing clothes.