“…In a recent meta-analysis performed on 10 studies, it was found that headache onset usually occurred before the 6th (82%), and before the 8th (100%) postoperative day, respectively [4,5,[20][21][22]. PDPH incidence decreasing in relation to finer needle diameters is largely reported in the literature [1,2,20,[23][24][25][26] and the high number of dural punctures increases the incidence of side effects, in particular PDPH [27].…”