Possible causes are as follows: 1. Muscle contracture caused by cold or cold, etc., all of which produce the feeling of back tightness and heaviness; 2. Cervical spondylosis compression of nerves, the emergence of innervated areas of the back of the sensory abnormalities; 3. Acute and chronic injury to the muscles of the low back, fatigue, scoliosis, improper posture, etc. may lead to the back of the muscle tension, contracture; 4. Radiation of organs and other pain, pain, such as angina pectoris in the chest, Pleurisy, lung cancer, pulmonary tuberculosis, stomach cramps, gastroduodenal ulcer, gastric cancer, acute and chronic gastritis, etc.