Post spinal headache true is
**Core Concept**
Post spinal headache, also known as post-dural puncture headache (PDPH), is a type of headache that occurs after a spinal tap or epidural injection. It is caused by the leakage of cerebrospinal fluid (CSF) through the dural puncture site, leading to a decrease in CSF pressure and subsequent stretching of the meninges and cranial nerves.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of post spinal headache. The leakage of CSF through the dural puncture site causes a decrease in CSF pressure, leading to traction on the meninges and cranial nerves, particularly the trigeminal nerve. This results in the characteristic symptoms of post spinal headache, including a dull, aching pain in the occipital or frontal region, often accompanied by nausea and vomiting.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the pathophysiology of post spinal headache. While it is true that post spinal headache can be exacerbated by dehydration, it is not the primary cause of the condition.
**Option B:** This option is incorrect because it is not a recognized cause of post spinal headache. In fact, post spinal headache is typically caused by a decrease in CSF pressure, not an increase.
**Option C:** This option is incorrect because it is not a direct cause of post spinal headache. While pain medication may be used to treat post spinal headache, it is not a primary cause of the condition.
**Clinical Pearl / High-Yield Fact**
To prevent post spinal headache, it is essential to use atraumatic needles and to limit the number of dural punctures. Additionally, patients should be instructed to remain hydrated and avoid heavy lifting or bending after the procedure.
**Correct Answer: D. Decrease in CSF pressure.**