The common causes of lumbar pain and numbness are as follows: First, lumbar disc herniation: it can lead to lumbar pain, continuous tension in the lumbar muscles, and insufficient blood supply to the muscles, which can cause nerve conduction dysfunction and can have clinical manifestations of lumbar numbness, which can cause pain and numbness symptoms in the lower limbs in severe cases. CT scans or the use of MRI can detect lumbar disc herniation lesions. Second, lumbar trauma: such as lumbar muscle injury or lumbar spine fracture, there will be a lot of local edema and bleeding, resulting in increased tissue interstitial pressure, which will also inhibit nerve conduction. The patient will show clinical symptoms of lumbar pain and numbness, but the symptoms are maintained for a relatively short period of time. After cold compresses, braking and rest, the symptoms will disappear completely. Therefore, if a patient develops lumbar pain and numbness, it is important to diagnose and treat it as early as possible.