Lumbar spinal stenosis foot numbness disappearing time is not certain, part of the patient through the treatment slowly can disappear, some difficult to relieve the need for surgical treatment. Lumbar spinal stenosis foot numbness is due to lumbar spine osteophytes, hypertrophy of the ligamentum flavum or lumbar disc herniation compression of the spinal cord and nerves caused by nerve root edema, resulting in irritation, so there will be a numbness of the innervated area of the phenomenon of mild recuperation through the slow numbness can gradually disappear. If the local compression is serious, conservative treatment can not lift the compression, numbness is usually difficult to relieve, severe walking with intermittent claudication, this situation conservative treatment is ineffective to recommend surgery, decompression and release of the laminae. Surgery is recommended to decompress and release the laminae. Recovery time of 1~3 months is still needed after surgery. Numbness of the feet due to lumbar spinal stenosis is uncertain depending on the degree of the lesion, and if the symptoms persist or worsen, it is recommended to go to the hospital for treatment in a timely manner.