The study is carried out in a prospective randomized controlled way. In the context of
informed understanding from parents, compared with traditional process(no anesthesia; lying
without the pillow and fasting water and food for four hours after lumbar puncture), randomly
select lidocaine surface anesthesia and postoperative management (lying without the pillow
for half an hour after lumbar puncture) . All children will be evaluated by the FLACC(The
face,legs,activity,cry,consolability behavioral tool) scale to assess the degree of pain
during and after lumbar puncture. Lumber puncture time, success rate and any postoperative
condition will be recorded and analyzed.A questionaire about the operation for all parents
and children will be investigated in order to establish an optimized lumbar puncture
management process.