The main causes of back pain are related to osteoarthritis, rheumatoid arthritis, changes in the structure of the lumbar vertebrae or prolonged exposure to cold. 1. Osteoarthritis, rheumatoid arthritis: arthritis caused by degenerative diseases or rheumatoid arthritis can cause symptoms such as cold back and feet, as well as back pain and leg pain. 2. Changes in lumbar vertebrae structure: If there are changes in lumbar vertebrae structure, such as lumbar intervertebral disc herniation or lumbar spinal stenosis, it is easy to compress the nerve root, which will produce the symptoms of lumbar coldness and cold feet, lumbar pain, and even accompanied by the problem of motor function. 3. Prolonged exposure to cold: If you are in a cold environment for a long time and do not pay attention to keeping warm, it is easy to produce the problem of impaired blood circulation, so it will lead to the symptoms of cold feet and cold back and back pain. If the symptoms are more serious, you need to check the cause of the disease, and then choose the treatment program. Specific treatment needs to be carried out under the guidance of a professional physician, usually pay attention to strengthening the diet and nutrition, appropriate exercise, and pay attention to keep warm.