Infants do lumbar puncture hazards, that is, its lumbar puncture side effects that may occur, and adults are basically similar, there are mainly the following points: 1, pain should be struggling to avoid the reaction, and adults are different, and their lack of understanding of the endurance of the lumbar puncture process has brought greater difficulty, increasing the risk of bleeding and heavier degree of pain; 2, the infection is a local skin infection or central nervous system infections, if the operating process Infection is local skin infection or central nervous system infection, which may occur if the operation process cannot strictly observe the aseptic operation procedure; 3. Low cranial pressure headache, after lumbar puncture, cerebrospinal fluid will be taken to do laboratory tests, and the circulating volume of cerebrospinal fluid in infants is originally small, and after obtaining a certain amount of cerebrospinal fluid, it will lead to a reduction in the total volume of cerebrospinal fluid circulating, which will lead to low cranial pressure headache and lead to more than one cry, and it is necessary to replenish fluids to deal with the situation; 4. Patients with tumors and displacements in the posterior cranial recess, the lower pressure decreases when lumbar puncture is performed, and the higher cerebral pressure in the upper part can make the brain tissues sink, which may induce occipital foramen magnum hernia, resulting in life-threatening conditions for the patient.