Back cold back stiffness may be due to cold stimulation, lumbar fasciitis and other physiological reasons, may also be due to rheumatism, ankylosing spine and other pathological reasons. 1. Physiological reasons: normal human tissue by the cold stimulation, there will be a reflex contraction, the local blood vessels and muscle tissue contraction, there will be a stiff back performance, is a normal phenomenon; in addition to the lumbar long-term strain caused by fasciitis patients, due to the local blood circulation is not good, the cold may also appear after the back of the stiffness of the situation. 2. Pathological reasons: If the patient himself has autoimmune diseases, may also appear after the cold back stiffness, such as rheumatism, ankylosing spondylitis, etc., autoimmune diseases will lead to lumbar joints and the soft tissue around the fibrosis or ossification, affecting the normal joint function, itself may exist in the lumbar stiffness, the cold stimulation may be aggravated by the situation. Based on the symptoms of cold back stiffness alone, it is sometimes impossible to accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor.