Aim: Assessment of the prevalence and associated risk factors of post dural puncture headache (PDPH) after cesarean section delivery under spinal anesthesia Methods: This Cross Sectional study conducted in the Department of Anesthesia, Madha Medical College Research Institute, Kovur, Chennai, Tamil Nadu, India for the period of 1 year. The entire procedures were performed at sitting position. The backside of the patients was cleaned with Iodine and alcohol. Spinal anaesthesia was done using a midline approach at the L2-3 or L3-4 interspaces by using different size of spinal needles and 0.5 % isobaric bupivacaine 2.5-3.0ml was injected