Although the symptoms of simultaneous numbness in the hands and feet of a patient with a herniated lumbar disc may not be very serious, the symptoms of simultaneous numbness in the hands and feet are not always caused by a herniated lumbar disc. A normal patient with a herniated lumbar disc will only experience numbness in the lower extremities, but not in the arms, palms, or fingers of the upper extremities. The symptoms of numbness in the palms and fingers need to be highly suspected to be accompanied by other diseases, such as cervical disc herniation or cervical spondylosis, as well as other nerve damage and nerve irritation symptoms can trigger the symptoms of numbness in the hands. To determine whether a lumbar disc herniation is serious, a lumbar CT or MRI examination is usually required to make a specific judgment, which can visually see the extent of the lumbar disc herniation and the degree of compression of the surrounding nerves. It is also possible to see if the lumbar disc herniation is compressing the cauda equina nerve. If there is numbness in the hands and feet at the same time, you should be alert to cardiovascular disease in addition to cervical spine disease.