Reviews Headache After a Chiropractic Adjustment: Why It Happens and When to Worry.
A mild headache after a chiropractic adjustment is common, and it usually fades within a day or two. It most often comes from the muscles and joints of the neck adapting to a new position, not from damage.
I’m Dr. Norris Golberg, a NUCCA Level 2 certified chiropractor in Louisville, Colorado. New patients tell me about this one often, usually the evening after the first visit. It was unsettling for me too when I was new to practice. Here is what is going on, how long it lasts, and the signs that mean you should not wait it out.
The short answer
- Normal: a dull, mild headache or tight feeling at the base of the skull that starts within hours and fades within one to two days.
- Call your chiropractor: a headache that lasts longer than three days, keeps getting worse, or returns after every visit.
- Go to the emergency room: a sudden severe headache, or a headache with weakness, numbness, slurred speech, double vision, confusion or fever. Details are below.
Why a headache can follow an adjustment
1. Muscle tension changes
Tension that has built up for months or years does not always release quietly. As the muscles at the base of the skull let go and re-balance, they can ache for a day.
2. The upper neck is a sensory hub
The top of the neck is packed with nerve endings that tell the brain where the head sits in space. When your posture changes, that signal changes too. The nervous system needs a short time to adapt, and a headache can be part of that adjustment period.
3. Dehydration
We live at altitude in a dry climate, and mild dehydration alone can cause headaches and tighter muscles. I ask every new patient to drink extra water after the first visit for this reason.
4. Pain moves before it improves
Many people get relief in the area that hurt and then notice tension somewhere they had not been aware of, such as the head and upper back. As the body adapts, that usually settles within the first several visits.
5. Stress, sleep and a first visit
Nervousness, a short night of sleep, or a long day of screen time can set up a headache that gets blamed on the adjustment.
How common is it?
Minor reactions are more common than most people expect, and serious ones are rare. In a prospective survey of 19,722 patients treated by UK chiropractors, no serious adverse events were reported, and headache in the following week was estimated at no more than about 4 per 100 treatment visits (Thiel et al., Spine 2007). In my own practice, most patients notice this once or twice, if at all.
What about migraine or tension headaches after a visit?
A tension-type headache after an adjustment usually feels like a band or pressure across the forehead or the base of the skull, and it tracks with the muscle changes above. A migraine after an adjustment is less common, and it may mean the care was too aggressive for you that day or that a migraine was already building. Either way, tell your chiropractor. If you are not sure which type of headache you have, our guide to tension headaches vs. migraines explains the differences.
When a headache is not normal
Go to the emergency room if you have any of these after an adjustment, or at any time:
- An abrupt, severe headache like a thunderclap.
- Headache with fever, confusion, seizures, double vision, slurred speech, or numbness or weakness in any part of the body.
- Headache after a head impact or trauma.
- A chronic headache that is worse after coughing, exertion, straining or a sudden movement.
- New headache pain after age 50.
- New, severe neck pain together with dizziness.
On the question people worry about most, stroke: a large population study of 818 vertebrobasilar strokes in Ontario found no excess risk associated with chiropractic visits compared with primary care visits. The likely explanation for the association it did find is that people whose headache and neck pain come from an artery problem seek care before the stroke happens. Headache and neck pain can be early signs of that, which is one more reason to take new or severe symptoms seriously (Cassidy et al., Spine 2008). Stroke after an adjustment is very rare, and a careful history and examination before care is part of how a chiropractor screens for it.
What helps a headache after the chiropractor
- Drink water through the day.
- Rest, and keep your head and neck in a comfortable, neutral position.
- Use gentle movement. Avoid forceful stretching or “cracking” your own neck.
- Note when it started, where it is, and what it feels like, then tell your chiropractor. That detail changes how the next visit is done.
Why some adjustments are rougher than others
A reaction is not a sign that the care is working harder. When the correction is routine, the force is the same whether or not your structure needs it. At Koru, care starts with measurement. We use on-site 3D CBCT imaging and neuro-structural testing to see how the top of your spine sits, and the NUCCA correction is calculated for that structure and delivered without twisting or cracking. No method can promise you will never feel a reaction, but measuring first removes the guesswork and keeps the force no greater than it needs to be. This is part of Koru’s Corrective Care Approach, and it is why many people who were told chiropractic was “too rough” for them end up doing well here. If your headaches themselves are the main problem, read about upper cervical misalignment and cervicogenic headache.
Frequently asked questions
Yes. A mild headache after an adjustment is a common, short-lived reaction, and it usually fades within a day or two. In a national survey of 19,722 chiropractic patients in the United Kingdom, researchers estimated that headache in the week after neck manipulation occurred at no more than about 4 per 100 treatment visits, and no serious adverse events were reported.
Most last a few hours to two days, and often start the evening of the visit. A headache that is still present after three days, keeps getting worse, or returns after every visit is not something to wait out. Call the office so the care can be modified.
The upper neck is dense with sensory nerve endings that report head position to the brain. When posture and muscle tension change, that signal changes, and the muscles at the base of the skull often respond with a temporary ache. Dehydration, a poor night of sleep, and the stress of a first visit can add to it.
Go to the emergency room for a sudden, severe thunderclap headache; a headache with fever, confusion, seizure, double vision, slurred speech, or numbness or weakness; a headache after a head injury; or new, severe neck pain with dizziness. If you are unsure, treat it as urgent and get evaluated.
Drink water, rest, keep your head and neck in a comfortable neutral position, and use gentle movement rather than forceful stretching. Tell your chiropractor what happened and when, because the details change how the next visit is done.
Koru Chiropractic in Louisville, Colorado, serves patients from Boulder, Broomfield, Lafayette, Erie and Superior. Dr. Norris Golberg is NUCCA Level 2 certified. Care starts with measurement, including on-site 3D CBCT imaging, and the correction is calculated for your structure and delivered without twisting or cracking the neck.
If you want a gentler, measured approach
Start with a free consultation: a conversation about your history and whether our approach fits. No exam, testing or imaging is part of it. If you decide to go further, the Initial Neuro-Structural Evaluation is where we measure and show you what we find. Schedule a consultation.
This article is educational and is not a substitute for medical advice. If you think you may be having a medical emergency, call 911.
Sources
- Thiel HW, Bolton JE, Docherty S, Portlock JC. Safety of chiropractic manipulation of the cervical spine: a prospective national survey. Spine. 2007;32(21):2375-8. doi:10.1097/BRS.0b013e3181557bb1 (via PubMed)
- Cassidy JD, Boyle E, Cote P, et al. Risk of vertebrobasilar stroke and chiropractic care: results of a population-based case-control and case-crossover study. Spine. 2008;33(4 Suppl):S176-83. doi:10.1097/BRS.0b013e3181644600 (via PubMed)