Chiropractic adjustment is generally safe when performed by a licensed practitioner on an appropriate candidate. Most people experience no complications at all, and the serious risks that do exist are rare. That said, “safe” depends heavily on your individual health profile, the area of the spine being treated, and whether your chiropractor properly screens for conditions that make manipulation risky.
Common Side Effects
The most frequent complaints after a chiropractic adjustment are mild and short-lived. Some people develop soreness in the area that was treated, headaches, or fatigue. These typically resolve within a few days and are comparable to what you might feel after a new workout. Not everyone experiences them, and they generally decrease with subsequent visits as your body adapts to treatment.
The Stroke Risk With Neck Adjustments
The most widely discussed serious risk involves cervical (neck) manipulation and its potential connection to stroke. The concern centers on the vertebral arteries, which run along the bones in your neck before entering the base of your skull. Just before reaching the brain, these arteries shift from a vertical to a horizontal path, making them vulnerable to stretching during rotation or extension of the neck. In rare cases, this stretching could tear the artery wall, a condition called dissection, which can lead to a blood clot and stroke.
How often does this actually happen? A sub-analysis of a large study on artery dissection found that out of more than 4,000 cases of cervical artery dissection, about 5.7% were diagnosed after chiropractic neck manipulation. Given that an estimated 100 million cervical chiropractic manipulations occur in the U.S. each year, the researchers concluded the likely risk of dissection associated with manipulation is very low. An important caveat: some patients who experience a dissection after an adjustment may have already had one developing beforehand, with neck pain as an early symptom that led them to seek chiropractic care in the first place. Disentangling cause from coincidence remains one of the harder questions in this area.
Lower Back Risks
For the lumbar spine, the rare but serious concern is cauda equina syndrome, a condition where nerves at the base of the spinal cord become compressed, potentially causing loss of bladder control, leg weakness, or numbness. A retrospective study of U.S. academic health centers found that cauda equina syndrome occurred in 0.07% of patients who received chiropractic spinal manipulation, compared to 0.11% of patients who received a physical therapy evaluation instead. The researchers noted that patients who develop this condition after manipulation likely had a pre-existing disc herniation or symptoms that were already progressing before treatment. Biomechanically, the lumbar spine’s facet joints limit the rotational forces during manipulation, which provides some natural protection to the discs.
How Chiropractic Compares to Other Treatments
Safety doesn’t exist in a vacuum. Any treatment for pain carries some risk, including doing nothing and relying on over-the-counter painkillers. A large study of more than 291,000 Medicare beneficiaries with newly diagnosed neck pain compared three approaches: chiropractic manipulation alone, primary care with prescription pain medication, and primary care without medication. Patients who received chiropractic care had a 20% lower rate of measured adverse outcomes (including spinal injury, artery dissection, stroke, and medication complications) compared to those who received prescription pain drugs. They also had a 14% lower rate compared to primary care without medication. The group taking prescription analgesics had the highest risk of adverse outcomes among all three groups.
This doesn’t mean chiropractic care is risk-free, but it puts the risk profile in context. Long-term use of anti-inflammatory drugs carries its own well-documented dangers, including gastrointestinal bleeding and kidney problems, particularly in older adults.
Who Should Avoid Chiropractic Adjustment
Certain conditions make spinal manipulation dangerous regardless of the practitioner’s skill. Clinical practice guidelines list several absolute contraindications to high-velocity manipulation:
- Bone tumors in or near the spine, whether primary or metastatic
- Spinal cord tumors
- Structural instability of the spine
- Fractures in the area being treated
- Active infections of the spine
- Aneurysm or existing artery dissection
- Severe osteoporosis that compromises bone integrity
- Progressive neurological conditions
In some of these cases, a chiropractor may still be able to use gentler techniques like soft-tissue work or low-force mobilization rather than the traditional high-velocity thrust. The key is that your chiropractor identifies these conditions before treatment begins. A responsible practitioner will take a thorough health history, ask about symptoms like unexplained weight loss or changes in bladder function, and order imaging when something doesn’t add up.
Safety in Children
Pediatric chiropractic care uses significantly less force than adult adjustments, and the available data suggests serious complications are extremely rare. A retrospective study of 697 children under age 3 who received a total of 5,242 treatments at a chiropractic teaching clinic found a reaction rate of roughly 1 child in 100, or one reported reaction for every 749 treatments. None of these were serious (defined as lasting more than 24 hours or requiring hospital care). Six of the seven reported adverse effects involved increased crying.
A broader literature review of adverse events in infants and children receiving any type of manual therapy, including chiropractic, osteopathic, and physical therapy, found that serious injuries across all provider types were rare. Of the serious cases identified, a majority involved patients with pre-existing conditions that weren’t detected beforehand. No deaths associated specifically with chiropractic care were found in the published literature. That said, the evidence base for pediatric chiropractic remains smaller than for adults, and the techniques used should always be age-appropriate.
How to Reduce Your Risk
Most of the serious complications linked to chiropractic care involve either an undetected underlying condition or manipulation of the cervical spine. You can lower your risk in a few practical ways. First, be thorough with your health history. Mention any prior strokes, blood clotting disorders, vascular conditions, cancer history, or recent trauma. Second, if you’re uncomfortable with neck manipulation specifically, ask about alternative techniques. Many chiropractors offer instrument-assisted adjustments, flexion-distraction methods, or mobilization that don’t involve the high-velocity rotational thrust. Third, pay attention to your body afterward. Mild soreness is normal, but sudden severe headache, dizziness, difficulty speaking, or limb weakness after a neck adjustment warrants emergency medical attention.
A chiropractor who rushes through intake, skips examination, or adjusts every patient the same way regardless of their history is a red flag. The safety of chiropractic care depends as much on the practitioner’s judgment as on the technique itself.