A positional headache is a headache that changes intensity based on your body position, typically worsening when you stand or sit up and improving when you lie down. The most common cause is a drop in the volume of cerebrospinal fluid (the liquid cushioning your brain and spinal cord), which allows the brain to sag downward when you’re upright, pulling on pain-sensitive structures inside the skull.
Why Position Matters
Your brain floats in cerebrospinal fluid (CSF), which acts as a shock absorber. When that fluid volume drops, gravity pulls the brain downward every time you stand up. This stretches the membranes, blood vessels, and nerves that anchor the brain to the skull, and those structures are exquisitely sensitive to pain. Lying flat removes gravity from the equation, the brain settles back into its normal position, and the pain eases or disappears entirely.
There may also be a vascular component. When CSF pressure is low, venous blood flow changes in ways that reduce circulation back to the heart, leading to compensatory dilation of blood vessels inside the skull. This engorgement of veins adds to the headache and can contribute to dizziness or a feeling of pressure.
Common Causes
The most frequent cause of a positional headache is a CSF leak, where the fluid escapes through a tear or hole in the membrane surrounding the brain and spinal cord. These leaks fall into a few categories:
- After a spinal procedure. A lumbar puncture (spinal tap) or an epidural for pain relief during labor can puncture the membrane and cause leaking. This is called a post-dural puncture headache, and it’s the most well-recognized type.
- Spontaneous leaks. Sometimes a leak starts on its own, with no procedure or injury involved. Bone spurs along the spine, irregularities in the membrane around spinal nerve roots, or underlying connective tissue disorders like Ehlers-Danlos syndrome or Marfan syndrome can make a person more vulnerable. The estimated incidence of spontaneous intracranial hypotension is about 3.7 per 100,000 people per year, with women affected slightly more often than men.
- Trauma. An injury to the head or spine can tear the membrane and trigger a leak.
Less commonly, a positional headache can be related to problems with the autonomic nervous system, the network that controls heart rate, blood pressure, and blood flow. Postural tachycardia syndrome (POTS) can produce positional headaches alongside a rapid heart rate increase of more than 30 beats per minute within 10 minutes of standing. Distinguishing POTS from a CSF leak can be tricky because a CSF leak itself sometimes triggers a compensatory increase in heart rate, mimicking POTS.
What It Feels Like
The hallmark is a headache that reliably worsens within seconds to minutes of being upright and reliably improves when lying flat. The pain is often felt at the back of the head, the forehead, or both, and many people describe it as a dull, heavy ache that can become throbbing.
A positional headache rarely shows up alone. Other symptoms that commonly travel with it include:
- Nausea and vomiting
- Stiff neck or pain between the shoulder blades
- Ringing in the ears (tinnitus)
- Dizziness and difficulty with balance
- Sensitivity to light and sound
- Brain fog, including trouble concentrating
- Numbness or tingling in the arms
Because some of these symptoms overlap with migraines, positional headaches are frequently misdiagnosed. The key distinguishing feature is the consistent relationship to position. A migraine might feel better when you lie down in a dark room, but a positional headache virtually disappears when you go flat and returns predictably when you stand.
How It’s Diagnosed
Diagnosis starts with the pattern itself. If your headache consistently worsens upright and improves lying down, that’s a strong clinical signal. From there, an MRI of the brain with contrast is the primary imaging tool.
On MRI, doctors look for several characteristic signs of low CSF pressure. The most recognized is enhancement (brightening) of the membranes lining the inside of the skull, which shows up in roughly 72% of confirmed cases. Other findings include fluid collections beneath the skull lining, enlargement of the pituitary gland, downward displacement of the brainstem (sometimes called brain sagging), and engorgement of venous channels. No single finding is present in every case, so doctors often look for a combination.
If a spinal CSF leak is suspected, additional imaging of the spine may be used to locate the exact site of the leak. A 2025 consensus guideline published in the American Journal of Neuroradiology established updated recommendations for selecting and performing diagnostic imaging, aiming to standardize evaluation across different practice settings.
Initial Treatment
For positional headaches that develop after a spinal procedure, conservative measures are tried first for the initial 24 to 48 hours. These include lying flat as much as possible, staying well hydrated, taking standard pain relievers like ibuprofen or acetaminophen, and drinking caffeine. The recommended caffeine dose is 300 milligrams once or twice a day (roughly two to three cups of coffee per dose), with a maximum of 900 milligrams in 24 hours. Caffeine treatment should not continue beyond 24 hours. For breastfeeding mothers, a lower maximum of 200 milligrams per day is generally advised.
Prolonged bed rest beyond the first couple of days isn’t recommended. It doesn’t appear to speed healing and raises the risk of blood clots, especially in people who’ve recently given birth.
When Conservative Measures Aren’t Enough
If the headache isn’t improving or is getting worse after 24 to 48 hours of conservative care, the standard next step is an epidural blood patch. In this procedure, a small amount of your own blood is injected into the epidural space near the suspected leak site. The blood forms a clot that seals the hole in the membrane.
The success rates are meaningful but not perfect. After the first blood patch, about 32% of patients experience complete relief and roughly 73% get at least partial relief. Around 30% of people need a second procedure, which brings complete relief in about half of those cases. When imaging can pinpoint the exact leak location and the patch is placed at that precise spot, success rates after a single procedure jump to about 87%.
For spontaneous leaks that don’t respond to blood patches, more specialized interventions may be considered, including surgical repair of the leak site. These cases typically involve referral to centers with specific expertise in CSF leak management.
Risks of Leaving It Untreated
Most post-procedural positional headaches resolve on their own or with treatment within days to weeks. Spontaneous CSF leaks, however, can persist for months or longer if unrecognized. Left untreated, ongoing low CSF pressure can lead to chronic headaches, persistent neck pain, hearing loss, loss of smell and taste, and in rare but serious cases, bleeding inside the skull or infection of the brain’s lining (meningitis).
The positional pattern is the biggest clue. If you notice a headache that consistently worsens when you’re upright and disappears when you lie down, especially if it came on after a spinal procedure, a fall, or seemingly out of nowhere, that relationship to position is important diagnostic information worth bringing to a healthcare provider early.