Epidural blood patch (EBP) was performed for the treatment of severe postlumbar puncture cephalalgia in 118 young patients. Following the first EBP, 105 patients had relief of headache. Eleven of the 13 in whom it failed had a second EBP, with adequate relief in 10, giving an overall success of 97.5 percent. Lumbar epidural, caudal, and spinal procedures were successful in 3 patients 105 to 380 days after EBP. Soon after EBP, one patient developed facial paralysis and one complained of episodes of vertigo, dizziness, tinnitus, and ataxia without headaches. Residual complications included backache and/or back stiffness in 22 patients and paresthesia in two. Two-year follow-up revealed 95 percent patient acceptance of the procedure. EBP was found to be a safe, effective method for treating severe postlumbar puncture cephalalgia, provided a proper diagnosis is made and there is no contraindication.