Coldness in the lower back may be caused by physiological factors such as cold stimulation, female menstrual period and long-term strain, or it may be caused by pathologic factors such as lumbar disc herniation and spinal stenosis. 1. Physiological factors: firstly, the lumbar region is often stimulated by cold, without paying attention to the warmth of the lumbar region, there may be a feeling of coldness in the lumbar region, which is most common in young female patients; secondly, long-term lumbar strain, induced fasciitis, which affects the local blood flow, there may be a symptom of coldness in the lumbar region; during the period of women’s menstrual leave, eating too much cold food, there will also be a feeling of coldness in the lumbar region. 2. Pathological factors: If there are pathological changes in the lumbar region, it may also lead to the feeling of lumbar coldness, such as lumbar disc herniation, spinal stenosis, etc. Pathological factors may lead to the nerves innervating the area of lumbar coldness to be compressed, the blood circulation of the lumbar muscles is impaired, and acidic metabolites accumulate, so that the patient feels lumbar coldness. There may be other reasons for the coldness in the lower back, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.