CSF acts as a cushion supporting and protecting the brain. Leakage of CSF from the subarachnoid space through a dural breach, can lead to loss of this support. The resulting traction on the innervated tissues around the brain can be responsible for the headache that follows. This headache, called post-dural puncture (PDPH), or low-pressure headache (LPH), is postural and usually self limiting, appearing on the first or second day after dural puncture and lasting less than seven days. The data from the total 50 females undergone the caesarean sections were collected and presented as below. Spinal anaesthesia was performed using a midline approach. PDPH was diagnosed as fulfilling the following criteria. These are headache develops within 3 days after Dural puncture, headache that worsens within 15 minutes after sitting or standing and improves within 15 minutes after lying down. In the present study for PDPH using three fine gauge needles for spinal anaesthesia, the incidence was found to be Minimum with small size needles.