The phenomenon of cold wind on the back is mostly caused by back muscle strain, back fasciitis, osteoporosis and other factors. 1. Back muscle strain: long-term use of the back for gravitational activities will lead to fatigue injury of the back muscles, fascia and other soft tissues, resulting in poor blood circulation in the back, vascular constriction, and thus the back will be cold wind. 2. Dorsal fasciitis: strenuous exercise or frequent bending activities will lead to injury to the back fascia, resulting in aseptic inflammation, which affects the back fascia, so that the back fascial tissue nutritional deficiencies, which will feel the back of the cold wind. 3. Osteoporosis: Long-term osteoporosis will cause the loss of calcium in the body, affecting the electrical activity of the nerves of the muscles of the body, leading to abnormal spasmodic activity of the muscles, thus affecting the blood circulation of the back and making the back feel cold wind. If the back for a long time the symptoms of cool air, then you should immediately go to the hospital to check and targeted treatment.