Lumbar disc herniation generally does not cause drowsiness, and its main symptoms are lumbar pain, lower limb sensory abnormalities, etc. Drowsiness may be caused by cerebrovascular disease. Lumbar disc herniation is a common spinal surgical disease, the onset of which is mainly due to degeneration of the nucleus pulposus, annulus fibrosus and other intervertebral disc tissues, rupture of the annulus fibrosus leading to herniation of the nucleus pulposus, which oppresses the spinal cord nerve roots or the cauda equina and so on. As a result, symptoms such as lumbar pain, sciatica, numbness and weakness in the lower limbs, and even abnormal bowel movements occur. However, lumbar disc herniation usually does not have symptoms of drowsiness and other disorders of consciousness. The possible causes of drowsiness include insufficient cerebrovascular supply, intracranial hypertension and other cerebrovascular diseases, hypothyroidism, drug factors, anemia, folic acid deficiency and other nutritional disorders. It is recommended to go to the regular hospital for timely consultation to identify the cause and timely treatment.