Post spinal headache lasts for ?
**Core Concept**
Post-dural puncture headache (PDPH) is a type of headache that occurs after a spinal tap or epidural injection. It is caused by leakage of cerebrospinal fluid (CSF) through the puncture site, leading to a decrease in CSF pressure and traction on the meninges.
**Why the Correct Answer is Right**
The correct answer is typically around 5-7 days. This duration is thought to be due to the gradual resolution of the CSF leak, allowing the meninges to reabsorb the leaked fluid and normalize the CSF pressure. The onset of PDPH usually occurs within 48 hours after the procedure and can last for up to 14 days.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is too short. PDPH typically does not resolve within 1-2 days, as the CSF leak takes time to resolve.
**Option B:** This option is too long. While PDPH can last up to 14 days, it usually resolves within 7-10 days.
**Option C:** This option is not a valid duration. PDPH does not typically last for weeks or months.
**Clinical Pearl / High-Yield Fact**
A key factor in preventing PDPH is using a smaller gauge needle (e.g., 25G or 27G) and avoiding multiple punctures. These measures can help minimize the risk of CSF leakage and subsequent headache.
**Correct Answer:** C. 7 days