Clinically, we often think that the main causes of neck pain and restricted movement are spinal stenosis, herniated discs, muscle strain, blocked blood vessels, and nerve compression, but are these causes really the causes of neck pain? Or are they the same symptoms as neck pain? Some patients with neck pain can be seen clinically to have their heels raised when squatting. Why do people with neck pain have heel lift when squatting? Actually, when you understand it from the perspective of the fascial chain, everything becomes simpler. There are more than 600 muscles in the human body, but we can’t simply look at them separately, because many of them are closely related to each other. Some famous doctors even believe that the human body has two muscles in total, one in front and one in the back. The myofascial chain theory coincides with this, but in more detail. The myofascial chain theory divides the body into seven chains in detail, systematically reflecting which parts of the body are involved in damage to one area. Below I will describe why neck pain can sometimes affect the feet. Myofascial chains are a continuum of muscles, ligaments and related soft tissues that are connected either directly by fascia or indirectly by mechanics according to a specific hierarchy and orientation, and play an important role in maintaining body posture and generating movement. The muscles and fascia that constitute the same myofascial chain are characterized by continuity of direction, homogeneity and direct or mechanical connection, the essence of which is the line of force. The posterior surface chain refers to the myofascial chain of plantar fascia → triceps calf muscle → short head of biceps femoris → hamstring muscle → sciatic nerve → sacral ramus ligament → erector spinae → cranial parietal fascia. For example, when the plantar fascia, which is located on the bottom of the foot, is tense, it strains the triceps and hamstring tendons, which in turn affects the erector spinae and the cranial parietal fascia, thus causing neck pain. If we loosen the plantar fascia, triceps and hamstrings, we will also have a better effect on neck pain. So this is similar to Chinese medicine for headache and foot. In addition, when a person bends over to touch their toes with their knees straight, record the distance between their fingers and the ground. When a tennis ball is placed on the bottom of one foot, roll this tennis ball slowly for two minutes, making sure that the ball-shaped parts of the five toes and all the front range of the heel are pressed, then switch to the other foot and do the same action as above. Then have him do the bend over and touch the toes to create a dramatic effect. We believe that posture is the main cause of structural abnormalities and pain in the human body, and that long-term incorrect posture can lead to biomechanical mismatch. For example, a long term “rounded shoulders, hunched back, head drawn forward” upper cross posture will increase the curvature of the lower cervical spine and straighten the upper cervical spine, which will naturally cause damage to the soft tissues below the neck and shoulder joints. The so-called core muscle group is located in the front and back of the abdomen around the torso, responsible for protecting the important muscle groups of spinal stability, transverse abdominis, pelvic floor muscle group and lower back muscles in this area. And from the point of view of the fascial chain, the core muscle group should start at the arch of the foot, as it can be seen from the front surface chain, the side chain, etc. Therefore, damage to the foot can also affect the core muscle group. In summary, when dealing with a patient in pain, the physician will observe the posture, movement patterns, motor control and breathing patterns, correct the posture of the whole body if there is a problem with a particular part, then analyze the movement patterns as well as allow the patient to learn motor control and adjust his breathing patterns. If there is still pain, the doctor will need to treat the adjacent muscles, such as the shoulder girdle and intrinsic cervical muscles of the neck. The overall treatment plan is that correct posture, posture, and breathing come first and relaxation comes second, otherwise incorrect posture will still cause the muscles to re-tense and cause pain.