The complications of lumbar puncture mainly include dizziness, infection at the puncture needle hole, and intracranial infection, as follows: First, dizziness: the complication of dizziness generally occurs most commonly because of elevated intracranial pressure, which requires releasing part of the cerebrospinal fluid through lumbar puncture to lower the cranial pressure, but the intracranial pressure changes after lumbar puncture, so it can lead to dizziness, and the symptoms can be gradually relieved after lying down for a few hours. Second, infection at the puncture needle hole: the complication of infection at the puncture needle hole usually occurs because of the lack of strict disinfection before surgery or the lack of timely disinfection and improper care of the wound after surgery. Third, intracranial infection: There can also be intracranial infection, which is caused by bacteria entering the spinal canal during lumbar puncture without strictly following the operating procedures, resulting in cerebrospinal fluid infection.