The causes of low back pain are complex, and low back pain judgment often requires careful observation, analysis, and generalization to reach a conclusion. Since there are many ways to determine the cause of low back pain, we only look at the pattern of the time of day when low back pain strikes to allow patients to make self-judgment: One: If the patient wakes up in the morning and feels the most pain – in general, this is pain caused by inflammation of tissues. For example: arthritis, myofasciitis, ankylosing spondylitis, etc., the main performance is: the attack time is the most painful when waking up in the morning, after the activity, the symptoms of pain reduced. This is due to the lack of activity at night, the waste materials produced by metabolism accumulate in the local tissue, stimulating the painful nerves and causing low back pain, after the activity of increased blood circulation, these waste materials away, thus reducing pain. Second, low back and leg pain, activity intensifies, rest relieves —– alert lumbar disc herniation. The main cause of this pain may be due to a herniated lumbar disc compressing the nerve roots. The lumbar region is located in the lower part of the torso and naturally bears the most weight, plus the lumbar region is where the entire torso moves most frequently, so the lumbar region is a common site of pain. And in the day, with the work time gradually, the more the lumbar intervertebral disc is herniated, so the more the lumbar pain is intensified. After a night’s rest, the intervertebral disc is slightly reset, the pressure on the compressed nerve is reduced, and the lumbar pain is relieved, so these patients often have less lumbar pain in the morning, or even no pain at all, but work until after noon, that is, the onset of lumbar pain, the more pain in the evening. Third, waking up from a dream with pain – beware of cancer pain. This kind of pain often occurs in the dead of night and can wake a person up from sleep, or the later it is, the more painful it is, and the more sleepless it is. This kind of cancer pain has one characteristic, that is, if the pain is gently tapped, the pain will usually be aggravated, which is the opposite of the general muscle pain that is more comfortable when gently tapped.