Post-Dural Puncture Headache (PDPH) is a type of headache that can occur after a spinal tap or epidural anesthesia. It results from a leak of cerebrospinal fluid (CSF) through a puncture in the dura mater, the protective covering of the spinal cord. This leakage can lead to decreased CSF pressure, causing headaches that are often worse when sitting or standing. Symptoms of PDPH typically include a throbbing headache, neck stiffness, and sensitivity to light and sound. The headache usually develops within a few days after the procedure and can last for several days or weeks. Treatment options may include hydration, caffeine, or, in some cases, a blood patch to seal the leak.