Medical Professionals Issue Urgent Warning Over Rising Stroke Risk Linked to Improper Spinal Adjustment Practices

The growing popularity of spinal adjustment therapy, commonly known as chiropractic care, has prompted a series of urgent warnings from the medical community in Vietnam following a rise in severe neurological complications, including life-threatening strokes. Dr. Nguyen Thi Minh Duc, Head of the Neurology Department at the Neuroscience Center of Tam Anh General Hospital in Ho Chi Minh City, recently highlighted a disturbing trend where patients seek these services at unregulated facilities or from practitioners lacking formal medical training. While chiropractic care is often marketed as a drug-free and non-invasive solution for chronic pain, posture correction, and enhanced mobility, unscientific and aggressive manipulation techniques—particularly those involving the sudden rotation or "cracking" of the neck—can lead to catastrophic vascular injuries.

The shift toward alternative medicine and physical therapy has been accelerated by social media trends, where "bone-cracking" videos garner millions of views, often presenting spinal manipulation as a quick fix for sedentary lifestyle ailments. However, clinical evidence from leading hospitals suggests that without a rigorous medical screening process, these maneuvers can be lethal. Tam Anh General Hospital has recently documented several cases where patients arrived in emergency departments with clear signs of stroke immediately following or shortly after a spinal adjustment session. These incidents underscore the thin line between therapeutic relief and permanent disability.

Clinical Evidence: The Human Cost of Improper Manipulation

The risks associated with unscientific spinal manipulation are best illustrated by the harrowing experiences of patients who sought relief for minor discomfort but ended up facing major medical crises. One notable case involved a 37-year-old office worker identified as Mr. H., who sought spinal adjustment to alleviate routine neck and shoulder tension. During the session, the practitioner performed several high-velocity thrusts and rotations on his cervical spine. Shortly after the procedure, Mr. H. began experiencing a sharp headache in the occipital region, accompanied by dizziness and transient blurred vision.

Upon admission to Tam Anh General Hospital, advanced diagnostic imaging, including Magnetic Resonance Imaging (MRI) and Magnetic Resonance Angiography (MRA), revealed a terrifying diagnosis: a right vertebral artery dissection. This condition occurs when the inner lining of the artery is torn, allowing blood to enter between the layers of the vessel wall and create a clot. In Mr. H.’s case, this led to a minor ischemic stroke in the brainstem. Fortunately, because he sought medical attention early, he responded well to intensive internal medicine treatment and was able to avoid permanent paralysis.

A similar, perhaps more severe, incident occurred with a 42-year-old woman, Ms. L., who underwent a massage session that included aggressive neck twisting and manipulation. Almost immediately after the "adjustment," Ms. L. was struck by intense vertigo, projectile vomiting, and a sudden onset of numbness and weakness on one side of her body. Clinical examinations confirmed an internal carotid artery dissection, which had triggered an acute ischemic stroke. These cases are not isolated; they represent a documented medical phenomenon where mechanical stress on the neck leads to the compromise of the primary vessels supplying blood to the brain.

The Biological Mechanism: How Manipulation Leads to Stroke

To understand the danger, one must look at the delicate anatomy of the human neck. The brain receives its blood supply through four major arteries: two carotid arteries at the front and two vertebral arteries that thread through the bony structures of the cervical vertebrae at the back. These vessels are remarkably resilient to the natural range of motion of the head. However, they are highly susceptible to "high-velocity, low-amplitude" (HVLA) thrusts—the signature move of many spinal adjustments.

When the neck is rotated or flexed beyond its physiological limits with sudden force, the stretching of these arteries can cause a "dissection." This is essentially a tear in the tunica intima, the innermost layer of the artery. Once the tear occurs, blood can collect within the wall of the artery, narrowing the lumen (the space where blood flows) or causing a complete blockage. More dangerously, the body’s natural clotting mechanism may respond to the tear by forming a thrombus (blood clot). This clot can then break loose and travel downstream into the smaller vessels of the brain, a process known as an embolism, which cuts off oxygen and leads to the death of brain tissue—a stroke.

Medical research suggests that the vertebral arteries are particularly vulnerable during rotation because they are anchored within the transverse foramina of the vertebrae. When the neck is twisted sharply, the artery can be stretched over the bony surfaces, leading to mechanical trauma. If the damage occurs in the posterior circulation (the back of the brain), it affects the brainstem and cerebellum, which control vital functions such as breathing, heart rate, balance, and coordination.

Supporting Data and the Global Context

The concern voiced by Dr. Minh Duc aligns with international medical consensus. The American Heart Association (AHA) and the American Stroke Association (ASA) have previously issued scientific statements regarding the association between cervical manipulative therapy and the risk of cervical artery dissection. While the statistical incidence of stroke following spinal manipulation is estimated to be relatively low—ranging from one in several hundred thousand to one in several million maneuvers—the impact is disproportionately high because the victims are often young or middle-aged adults with no prior history of cardiovascular disease.

In Vietnam, the lack of a stringent regulatory framework for chiropractic clinics has exacerbated the risk. Many facilities operate as "wellness centers" or "spas" rather than medical clinics, bypassing the requirement for licensed medical doctors to oversee treatments. Furthermore, the "ASMR" (Autonomous Sensory Meridian Response) trend on platforms like TikTok and YouTube has romanticized the audible "pop" or "crack" of a spinal adjustment. This sound is actually caused by cavitation—the formation and collapse of gas bubbles in the joint fluid—and is not necessarily an indicator of a successful treatment. However, the pursuit of this sound often leads practitioners to use excessive force, increasing the likelihood of arterial injury.

Risk Factors and the Necessity of Medical Screening

A primary point of contention for medical professionals is the lack of pre-treatment screening in many chiropractic settings. Dr. Minh Duc emphasizes that spinal manipulation should never be a "one-size-fits-all" procedure. There are several contraindications and risk factors that must be ruled out through clinical examination and imaging before any high-force adjustment is attempted.

Individuals at high risk include those with:

• Hypertension and Atherosclerosis: Weakened or narrowed arterial walls are more prone to tearing.
• Osteoporosis: Fragile bones can fracture or shift dangerously during manipulation.
• Blood Clotting Disorders: Patients on anticoagulants (blood thinners) are at a much higher risk of internal bleeding if a vessel is damaged.
• Connective Tissue Disorders: Conditions like Ehlers-Danlos syndrome make blood vessels more elastic and susceptible to dissection.
• Existing Vascular Anomalies: Many people have undiagnosed arterial "kinks" or loops in their neck that make certain movements hazardous.

Dr. Minh Duc asserts that a professional practitioner must evaluate a patient’s medical history, conduct a neurological physical exam, and, in many cases, request X-rays or ultrasound scans to ensure the structural integrity of the spine and the health of the vascular system. Skipping these steps is a violation of medical safety protocols and places the patient’s life in jeopardy.

Official Recommendations and Safety Guidelines

In response to the rising number of injuries, health experts are calling for a more cautious approach to spinal health. The medical community does not dismiss the potential benefits of chiropractic care entirely; when performed by a qualified professional on a properly screened patient, it can indeed alleviate certain types of musculoskeletal pain. However, the "unscientific" and "unregulated" nature of the current trend is what poses the greatest threat.

The following guidelines have been issued for the public:

1. Verify Credentials: Only seek spinal adjustments from practitioners with recognized medical degrees and specialized training in chiropractic medicine or physical therapy.
2. Avoid "Social Media" Techniques: Never attempt to replicate "neck cracking" maneuvers seen online, and do not allow untrained individuals to perform them on you.
3. Demand a Consultation: A legitimate practitioner will always conduct a thorough intake and explain the risks before touching the patient.
4. Listen to Your Body: If a treatment causes sharp pain, dizziness, or nausea, it should be stopped immediately.

Furthermore, medical professionals urge the public to recognize the "Golden Hour" of stroke treatment. If any neurological symptoms appear during or after a neck manipulation, time is the most critical factor. The brain loses approximately 1.9 million neurons every minute during a stroke. Immediate transport to a hospital capable of performing emergency thrombolysis (clot-busting medication) or mechanical thrombectomy (clot removal) is the only way to prevent permanent brain damage or death.

Broader Impact and Implications for Public Health

The surge in chiropractic-related strokes is a symptom of a broader issue in modern healthcare: the commercialization of wellness at the expense of clinical safety. As more people seek alternatives to traditional surgery and pharmaceuticals, the market for "natural" therapies has exploded, often outpacing the regulations meant to protect consumers. This creates a vacuum where profit-driven clinics can prioritize high patient turnover over rigorous safety standards.

The cases of Mr. H. and Ms. L. serve as a sobering reminder that "non-invasive" does not mean "risk-free." The human spine and its surrounding vascular network are among the most complex and delicate systems in the body. Treating them with anything less than the highest level of medical precision is a gamble. As the Vietnamese Ministry of Health and global medical bodies continue to monitor these trends, the message remains clear: the quest for a "quick fix" for back or neck pain should never come at the cost of one’s neurological health.

The medical community continues to advocate for integrated care models, where chiropractors work closely with neurologists and orthopedic surgeons. This ensures that patients receive the benefits of physical therapy while remaining under the safety umbrella of evidence-based medicine. Until such standards are universally applied, the burden of caution falls on the individual. Recognizing the warning signs—sudden headache, loss of balance, facial drooping, or speech difficulties—and understanding the risks of unscientific manipulation are the best defenses against the hidden dangers of the spinal adjustment trend.