The purpose of lumbar puncture to go pillow lying down is mainly to prevent the occurrence of low cranial pressure syndrome, because after lumbar puncture to draw out the local cerebrospinal fluid, which will directly lead to changes in the pressure of the brain side, it needs 6 hours of circulation time, so that the body will be self-adjustment, so as to restore the normal intracranial pressure of the brain, to prevent the after-effects of the disease, otherwise, there will be dizziness, headache, and even brain tissue damage, so lumbar vertebrae After lumbar puncture, go to the pillow and lie down for 6 hours for observation, not pillow, maintain the body in a horizontal plane. If abnormal symptoms occur during the process, please notify the doctor in time and choose further countermeasures to prevent serious complications.