For most people, going to a chiropractor is not bad. Spinal manipulation is recognized as a legitimate treatment option for low back pain by the American College of Physicians, and serious complications are rare. That said, chiropractic care does carry mild side effects for a significant number of patients, and certain medical conditions make it genuinely unsafe. Whether it’s a good idea for you depends on what you’re treating, your overall health, and your expectations going in.
What the Evidence Says About Effectiveness
The strongest case for chiropractic care is in treating low back pain, which is what most patients seek it for. A 2017 analysis of 15 studies with nearly 1,700 participants found that spinal manipulation produced a modest improvement in acute back pain, roughly comparable to the relief you’d get from over-the-counter anti-inflammatory drugs like ibuprofen. A separate look at 12 studies showed similar modest improvements in how well people could move and function.
For chronic low back pain, a large 2019 review of 47 studies covering over 9,200 people found that spinal manipulation provided short-term pain relief similar to other recommended treatments like exercise and medication. For physical function, manipulation performed slightly better. A 2020 federal analysis confirmed small improvements in both pain and function lasting up to about six months.
None of this suggests chiropractic care is a miracle fix. The improvements are consistently described as “small” to “modest.” But they’re real and measurable, and for people trying to manage back pain without medication, that can matter. The American College of Physicians includes spinal manipulation in its guidelines as a first-line nonpharmacologic option for both acute and chronic low back pain, alongside options like massage, acupuncture, exercise, and yoga.
Neck Pain Results Are Less Clear
The evidence for neck pain is thinner. Spinal manipulation appears to be roughly as effective as other recommended approaches like physical therapy or standard medical care, but the research hasn’t clearly established that it’s superior to any of them. One finding worth noting: adding manual therapy to an exercise routine provided better short-term pain relief and higher patient satisfaction than exercise alone. So for neck issues, combining chiropractic visits with a consistent exercise program may be the most practical approach.
Common Side Effects After an Adjustment
Chiropractic adjustments are not side-effect-free. In one systematic review, 61% of patients reported at least one adverse effect after treatment. The most common were headache (20%), stiffness (20%), local discomfort at the treatment site (15%), pain radiating to other areas (12%), and fatigue (12%). A separate study found that 30% of patients experienced at least one side effect, with increased pain and tiredness being the most frequent complaints.
These effects are transient. They typically resolve within a day or two, similar to the soreness you might feel after a deep tissue massage. They’re not dangerous, but they’re common enough that you shouldn’t be surprised if you feel a bit worse before you feel better, especially after your first few sessions.
Serious Risks Are Rare but Real
The most concerning risk involves neck manipulation specifically. Cervical adjustments have been linked to vertebral artery dissection, a tear in the artery wall that can lead to stroke. The most widely cited estimate puts this risk at roughly 1 in 5.85 million cervical manipulations. That’s extremely low, but not zero, and strokes from this cause can be severe or fatal.
This is the main reason certain people should avoid chiropractic neck adjustments entirely. The Mayo Clinic lists the following as contraindications:
- Severe osteoporosis, which makes bones fragile enough to fracture under the force of manipulation
- Numbness, tingling, or weakness in an arm or leg, which could signal nerve compression that manipulation might worsen
- Cancer in the spine, where tumors may have weakened the vertebrae
- Known increased stroke risk, including vascular conditions
- Structural abnormalities in the upper neck bones
If any of these apply to you, chiropractic manipulation is not appropriate and could cause serious harm.
What Actually Happens During the “Pop”
The cracking sound you hear during an adjustment comes from gas behavior inside your joints. When the chiropractor applies a quick, controlled thrust, the joint surfaces separate rapidly. This drops the pressure inside the joint fluid, causing dissolved gas to form a bubble. It’s the same basic phenomenon as cracking your knuckles.
Interestingly, research has found that the popping sound itself has no relationship to whether the treatment works. Four separate studies concluded that the audible crack is not connected to improvements in pain or disability. Despite this, many chiropractors will repeat a manipulation if they don’t hear or feel a pop, which is more about clinical habit than evidence.
How It Affects Your Nervous System
Beyond the mechanical “realignment” narrative that many chiropractors use, the actual therapeutic mechanism likely involves your nervous system. Spinal manipulation stimulates sensory nerve fibers in the tissues around your spine, including receptors in muscles and tendons that help your body sense position and movement. Multiple studies show that manipulation increases pain tolerance and raises pain thresholds, suggesting it changes how your central nervous system processes pain signals rather than simply moving bones back into place.
One theory is that the physical input from manipulation removes low-level irritating stimuli from the tissues around your spine, essentially resetting an overactive pain response. This is a more nuanced explanation than “putting your spine back in alignment,” and it better fits the pattern of modest, temporary relief that the clinical research consistently shows.
What Makes a Qualified Chiropractor
Chiropractors earn a Doctor of Chiropractic degree, which requires graduating from an accredited chiropractic college after completing undergraduate coursework (a full bachelor’s degree in some states). They must pass national board exams administered by the National Board of Chiropractic Examiners and meet additional licensing requirements in their state. This is substantially less training than a medical doctor receives, but it is a regulated professional credential with clinical training requirements.
Quality varies between practitioners. Some chiropractors stick closely to evidence-based treatment for musculoskeletal pain, while others make broader health claims about treating allergies, infections, or organ function that are not supported by research. A chiropractor who focuses on your specific pain complaint, sets realistic expectations, and doesn’t push you into an indefinite treatment plan of three visits a week is generally a better bet than one promising to cure conditions unrelated to your spine.
Who Benefits Most
Chiropractic care makes the most sense for people dealing with acute or chronic low back pain who want a non-drug option, particularly if they’ve already tried rest and over-the-counter pain relievers without enough relief. It’s also reasonable for neck pain when combined with exercise. Most people with acute back pain improve over time regardless of treatment, so chiropractic care is one of several tools that can help manage symptoms while your body heals.
It makes less sense as a long-term maintenance treatment if you’re not experiencing active symptoms. The benefits shown in research are short to intermediate term, and there’s no strong evidence that regular “wellness” adjustments prevent future problems. If a chiropractor recommends ongoing visits after your pain has resolved, that’s worth questioning.