Neck tightness, usually due to the neck muscles, ligaments, tendons, and soft tissues, there is a cold and fatigue, strain, such as maintaining a posture for too long, low head down, watching the phone, watching the computer, reading the newspaper, etc., the entire neck muscles will be in a fatigue, strain, especially in the seated position, the bilateral elbow joints are not supported, the table is shorter, the stool is higher, which will cause the The entire neck, shoulder and back muscles are fully in a state of tension and strain, and after a long time, aseptic inflammatory foci will be formed, and the inflammatory metabolic products stimulate the muscles as well as the surrounding soft tissues, which will also lead to tension in the surrounding soft tissues. Another situation is cold, because after the cold will slow down the blood circulation, inflammatory metabolites accumulation, will be further aggravate the stimulation of the surrounding muscles and soft tissues, resulting in more tension, and the muscles will also be in a state of tension after the cold.