A herniated disc can cause local back or neck pain, but the symptoms that often drive people to seek care are nerve-related: sciatica, arm pain, numbness, tingling, burning, or weakness. An MRI may show a protrusion, extrusion, sequestration, foraminal narrowing, or nerve-root contact, yet the scan alone does not determine how severe the symptoms will be or which treatment is appropriate.
At Woodlands Family Chiropractic (WFC), Cox Decompression is one of the adjustment techniques listed among the practice’s conservative care options. Cox Flexion-Distraction uses slow, clinician-controlled flexion and distraction on a specialized table rather than a rapid high-velocity thrust. The goal is not to promise that a disc can be “put back in place.” The goal is to determine whether a low-force, mechanically directed approach fits the patient’s diagnosis, neurological findings, comfort, and functional goals.
For patients in The Woodlands and surrounding communities, this page explains where Cox Decompression may fit, what published research actually shows, who may or may not be a candidate, what to expect during an evaluation, and when medical or surgical referral should take priority.
Schedule a spinal evaluation with WFC to review your symptoms, neurological findings, prior treatment, and imaging when available. The appropriate next step may include Cox Flexion-Distraction, another conservative approach, co-management, or referral.
Cox Flexion-Distraction is a low-velocity, doctor-controlled form of spinal manipulation performed on a specialized table. The clinician stabilizes a selected spinal level while the movable portion of the table guides the spine through controlled flexion, distraction, lateral motion, or circumduction according to the clinical presentation and patient tolerance.
The movement is typically slow and repetitive. It generally does not rely on the rapid thrust or audible joint release commonly associated with traditional high-velocity chiropractic manipulation. WFC currently lists Cox Decompression among the adjustment techniques used in the practice. Technique availability does not mean it is appropriate for every patient; the choice should follow evaluation and screening.
Intervertebral discs sit between the vertebrae and help distribute load while allowing movement. Each disc has a tougher outer ring, the annulus fibrosus, surrounding a softer central material, the nucleus pulposus. A herniation occurs when disc material extends beyond its usual boundary through a weakened or disrupted portion of the outer ring. The location, morphology, available space around the nerve, inflammatory response, and individual pain sensitivity all influence whether symptoms develop.
Lumbar herniations can irritate nerve roots that travel into the buttock and leg. Cervical herniations can affect nerves traveling into the shoulder, arm, and hand. A herniated disc is therefore an anatomical finding; it does not by itself describe symptom severity or dictate treatment.
Radiology terminology distinguishes different disc shapes. A broad bulge involves a larger portion of the disc circumference. A protrusion is more focal. An extrusion extends farther beyond the disc space, and a sequestration refers to disc material that has separated from the parent disc. These categories can matter when discussing natural history, but the scan still needs to match the clinical picture.
That distinction is important because abnormal-looking MRI findings are common in people without pain. In a 2015 AJNR systematic review of 33 studies involving 3,110 asymptomatic people, disc bulges were estimated in 30% of 20-year-olds and 84% of 80-year-olds, while disc protrusions were estimated in 29% and 43%, respectively [1]. A useful evaluation therefore asks whether the imaging level and side correspond with the patient’s pain distribution, strength, reflexes, sensation, movement, and function.
The evidence below is presented in a structured way because different studies answer different questions. Imaging studies describe how common disc findings are. Natural-history studies describe what can happen over time. Clinical trials measure patient outcomes. Biomechanical studies measure forces and pressure changes but do not prove that patients will improve.
Study
Design / sample
Key data
What it means
Systematic review; 33 studies; 3,110 asymptomatic people
Disc bulges were estimated in 30% of asymptomatic 20-year-olds and 84% of asymptomatic 80-year-olds; protrusions in 29% and 43%, respectively.
MRI findings must be interpreted with symptoms and examination findings, not treated as a diagnosis by themselves.
Systematic review; 31 studies; 9 studies used for morphology-specific probability estimates
Reported spontaneous regression: sequestration 96%, extrusion 70%, protrusion 41%, bulge 13%. Complete resolution: 43% for sequestration and 15% for extrusion.
Some lumbar herniations change over time with conservative management; morphology matters. This is not a prediction for an individual patient.
Randomized clinical trial; 235 adults with chronic low-back pain; 123 flexion-distraction vs 112 active exercise
Both groups improved. Flexion-distraction produced greater pain relief (P=0.01); the radiculopathy subgroup did better with flexion-distraction. No significant between-group difference was found on Roland-Morris or SF-36 outcomes.
Supports possible clinical value for selected chronic low-back-pain patients, but it was not a trial limited to MRI-confirmed herniated discs.
Cadaveric laboratory study; 15 lumbar motion segments
Compared with simulated lying, nucleus pressure decreased 99% with axial distraction, 73% with extension-distraction, and 65% with flexion-distraction.
Shows a plausible mechanical effect of distraction in cadaver discs. It does not establish symptom relief or disc healing in living patients.
Pilot cadaveric study; 8 unembalmed cadavers; L2-L5 discs
Flexion-distraction significantly decreased intradiscal pressure at all studied levels; pressurized-disc decreases ranged from 17.8 kPa at L2-L3 to 122.0 kPa at L4-L5.
Confirms measurable pressure changes during the procedure under laboratory conditions; clinical outcome claims require separate evidence.
These symptoms are not unique to a disc herniation. Spinal stenosis, arthritis, peripheral nerve entrapment, muscle and joint disorders, vascular conditions, and other medical problems can create similar complaints. Diagnosis and neurological screening should come before technique selection.
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Many patients ask whether a herniated disc can change over time. A 2015 systematic review by Chiu and colleagues included 31 studies of conservatively managed lumbar disc herniation. In the studies that could be pooled by morphology, reported spontaneous regression was 96% for sequestrated discs, 70% for extruded discs, 41% for protrusions, and 13% for bulging discs [2]. Complete radiographic resolution was reported in 43% of sequestrations and 15% of extrusions.
Those percentages are population-level findings, not a forecast for one patient. Symptom improvement does not always require a scan to normalize, and radiographic regression does not guarantee that pain or weakness will disappear. Neurological status, pain severity, function, duration, and patient goals matter more than a single imaging statistic.
Natural regression data support the rationale for conservative management in appropriately screened patients. They do not justify delaying referral when weakness is progressing, spinal-cord signs are present, or cauda equina syndrome is suspected.
Most disc-related pain is not an emergency, but certain symptoms require urgent medical assessment rather than a routine chiropractic appointment.
If you develop new bowel or bladder changes, saddle numbness, rapidly progressive weakness, severe trauma, fever with severe spinal pain, or sudden loss of coordination or walking ability, seek urgent or emergency medical evaluation.
The treatment table does not literally “suck a disc back into place.” Laboratory research shows that distraction can change pressure inside a disc and alter spinal loading, but those mechanical findings are not the same as proof of disc retraction, healing, or symptom resolution in a living patient.
One of the more useful clinical trials compared flexion-distraction with an active trunk exercise program in 235 adults with chronic low-back pain. Participants were randomized to flexion-distraction (123 people) or active exercise (112 people). Both groups improved in pain and function. The flexion-distraction group reported greater pain relief (P=0.01), and the subgroup with radiculopathy did significantly better with flexion-distraction. There were no significant between-group differences on the Roland-Morris disability score or SF-36 general health measures [3].
A one-year follow-up of that trial found that both groups maintained improvement, while the flexion-distraction group had lower pain scores during the follow-up year (P=0.02) [4]. These studies support possible benefit in selected chronic low-back-pain populations, but they should not be described as proof that Cox Decompression cures a herniated disc or eliminates the need for surgery.
Biomechanical studies help explain what may happen to spinal tissues during distraction. In a Spine Journal cadaveric study of 15 lumbar motion segments, all distraction conditions markedly reduced nucleus pulposus pressure compared with simulated standing or lying. Compared with simulated lying, nucleus pressure decreased 99% with axial distraction, 73% with extension-distraction, and 65% with flexion-distraction [5].
A 2022 pilot cadaveric study measured intradiscal pressure during a Cox-type flexion-distraction procedure in eight unembalmed cadavers. Pressure decreased significantly at L2-L3, L3-L4, and L4-L5. In pressurized discs, mean decreases ranged from 17.8 kPa at L2-L3 to 122.0 kPa at L4-L5 [6]. These data demonstrate a mechanical effect under laboratory conditions. They do not establish the percentage of patients who will improve, how many visits are required, or whether MRI findings will change.
Clinical trials, imaging studies, and biomechanical experiments should not be blended into one claim. The most defensible interpretation is that flexion-distraction has a plausible mechanical mechanism and some clinical evidence for selected low-back-pain populations, while high-quality evidence specifically proving that Cox therapy reverses a herniated disc, prevents surgery, or outperforms all other conservative options remains limited.
Traditional spinal manipulation may use a brief high-velocity, low-amplitude thrust. Cox Flexion-Distraction uses slower, repetitive distraction and flexion on a specialized table. Neither method is automatically “better.” Technique selection depends on diagnosis, symptom irritability, neurological findings, contraindications, patient preference, and response to care.
Spinal decompression is a broad marketing and clinical term that may refer to motorized traction, manual traction, inversion, flexion-distraction, or other devices and procedures. Cox Flexion-Distraction is a clinician-delivered manual technique with defined treatment procedures. Research on one decompression method should not automatically be used to support every machine or program that uses the word “decompression.”
Exercise is not the opposite of decompression care. For many patients, manual treatment is most useful when it reduces symptom irritability enough to improve movement and participation in active rehabilitation. WFC also lists corrective rehabilitation among its services, allowing the care plan to address strength, endurance, mobility, movement tolerance, and return to daily tasks when appropriate.
A lumbar herniation may produce lower-back pain, buttock pain, sciatica, numbness, tingling, or weakness. Selected patients without emergency findings may be appropriate for a monitored trial of conservative care. Progress should be tracked with leg symptoms, strength, reflexes, sensation, walking tolerance, sitting tolerance, sleep, and function rather than back-pain intensity alone.
A cervical herniation may cause neck pain with shoulder, arm, or hand symptoms. Cervical distraction uses different contacts and positioning from lumbar care. New hand weakness, loss of dexterity, gait changes, balance problems, or signs of spinal-cord involvement require medical evaluation and may change whether manual care is appropriate.
Radiculopathy may include radiating pain, numbness, tingling, weakness, or reflex changes. A herniated disc is one possible cause, but stenosis, bone spurs, inflammatory irritation, and other conditions may contribute.
Degenerative changes can alter how the spine tolerates loading and may reduce available space around nerves. Some patients prefer flexion-biased or distraction-based positions; others do not. Severe instability, fracture risk, progressive neurological loss, or spinal-cord findings can change or rule out treatment.
A patient may be considered for a conservative trial when the history and examination are compatible with a mechanically manageable spinal or nerve-root condition, emergency signs are absent, neurological status is stable, and response to care can be monitored.
Prior spine surgery does not automatically exclude all conservative care, but treatment decisions should account for the surgical level, hardware, fusion status, bone health, current imaging, neurological findings, and communication with the surgical team when needed.
01.
The first step is determining whether the symptoms fit a routine mechanical or nerve-root presentation. History may include onset, trauma, prior episodes, medications, surgery, cancer history, osteoporosis risk, fever, unexplained weight change, bowel or bladder changes, and neurological symptoms. Examination may assess spinal motion, strength, reflexes, sensation, balance, gait, tension signs, and functional tasks.
02.
Imaging is not automatically required for every episode of back or neck pain. Existing MRI findings should be reviewed in context. Additional imaging or medical referral may be appropriate when there is progressive neurological loss, concern for serious pathology, significant trauma, a history that changes risk, persistent severe radicular symptoms, or when the result is likely to change management.
03.
If Cox Decompression is appropriate, the doctor can explain the working diagnosis, intended goals, alternative options, possible soreness or symptom flare, and the findings that would trigger a change in care. Another technique may be chosen when it better fits the diagnosis or patient preference.
04.
During a session, the patient typically lies on the specialized table while the clinician stabilizes a specific spinal region and guides the table through controlled motion. Force, direction, range, and repetitions are adjusted to the patient. Treatment should not be approached as “no pain, no gain.” New radiating pain, increasing numbness, weakness, dizziness, or an unexpected neurological change should be reported immediately.
05.
Progress should be measured using meaningful outcomes such as leg or arm symptoms, sleep, walking, sitting tolerance, work capacity, range of motion, strength, and confidence with activity. Home recommendations may include walking, position changes, graded mobility, trunk or neck endurance, lifting modification, and gradual return to normal activity. If meaningful improvement is not occurring, the diagnosis and plan should be reconsidered.
For selected patients, possible benefits include reduced pain, improved motion, less guarding, better tolerance for activity, and an easier transition into rehabilitation. The low-force nature of flexion-distraction may also appeal to people who are uncomfortable with rapid manipulation. Individual response varies and should be measured rather than assumed.
Temporary soreness, stiffness, fatigue, or a short-term symptom increase can occur after manual treatment. Serious complications are uncommon but possible, particularly when contraindications are missed or a serious condition is mistaken for routine musculoskeletal pain. Screening, informed consent, appropriate technique selection, and prompt referral are important parts of care.
There is no reliable universal schedule for herniated-disc care. Duration depends on symptom severity, neurological findings, overall health, work demands, chronicity, goals, and response. Published averages should not be converted into guarantees. A reasonable plan includes a defined treatment trial, objective reassessment, and a decision point if meaningful progress is not occurring.
No clinician can responsibly promise that Cox Decompression will prevent surgery. The SPORT randomized trial enrolled 501 surgical candidates with imaging-confirmed lumbar disc herniation and at least six weeks of radiculopathy; large crossover between treatment groups limited the intent-to-treat comparison [7]. Longer-term SPORT analyses found substantial improvement in both surgical and nonoperative groups, with greater improvement in several outcomes among patients who actually underwent surgery. The practical point is that conservative care and surgical consultation are not mutually exclusive. Stable patients may try nonoperative care, while progressive weakness, spinal-cord compression, cauda equina syndrome, or persistent disabling symptoms may justify specialist evaluation.
Woodlands Family Chiropractic serves patients at 1755 Woodstead Ct, Suite 100, The Woodlands, TX 77380. Dr. Kevin Keyes has served The Woodlands community since 1998, and the practice describes a team-based model that includes chiropractic care, corrective rehabilitation, and therapeutic massage. WFC’s current services page specifically lists Cox Decompression among its adjustment techniques.
The most important question is not simply whether the technique is available. It is whether the diagnosis, safety profile, neurological findings, patient preferences, and treatment goals make it a reasonable option. WFC should not claim Cox certification unless that credential is independently confirmed and current.
Call or text WFC at (936) 447-9484 to discuss an appointment. The current WFC website also lists a new-patient special of $134 for consultation, examination, and X-ray of one region; confirm the offer and eligibility before publishing because pricing and promotions can change.
Cox Decompression Therapy, also called Cox Flexion-Distraction, is a doctor-controlled, low-force form of spinal manipulation performed on a specialized table. It uses slow distraction and flexion movements rather than a rapid thrust.
It is one type of non-surgical decompression approach. The broader term spinal decompression may also describe motorized traction, inversion, or other techniques, so evidence should not be transferred automatically between methods.
Some patients with disc-related back, neck, arm, or leg symptoms may improve during a conservative-care trial that includes flexion-distraction. Research does not prove that the procedure will retract a disc, resolve symptoms, or prevent surgery in every patient.
A randomized trial of 235 adults with chronic low-back pain found improvement with both flexion-distraction and active exercise; flexion-distraction produced greater pain relief, and the radiculopathy subgroup did better with flexion-distraction. Biomechanical studies also show reduced intradiscal pressure during distraction, but laboratory findings are not the same as patient outcomes [3,5,6].
They can. A 2015 systematic review reported spontaneous regression rates of 96% for sequestrations, 70% for extrusions, 41% for protrusions, and 13% for bulges in conservatively managed lumbar herniations. These are population estimates, not a guarantee for an individual [2].
No. Degenerative and disc findings are common in people without pain. A systematic review of 3,110 asymptomatic people found disc bulges and protrusions across all adult age groups, with prevalence increasing for several findings with age [1]. Imaging should be matched to symptoms and examination findings.
The technique is generally low force and should be adjusted to comfort. Temporary soreness can occur. New radiating pain, increasing numbness, weakness, dizziness, or a significant flare should be reported immediately.
There is no fixed schedule for every patient. The plan depends on diagnosis, neurological findings, symptom duration, health, goals, and response. Care should be reassessed using measurable changes in pain and function.
It may be considered when sciatica is related to a mechanically manageable lumbar condition and emergency signs are absent. Sciatica has multiple causes, so evaluation and neurological screening are important.
It cannot be promised to prevent surgery. Some patients improve with non-surgical care, while others need specialist evaluation because of persistent disability, progressive weakness, spinal-cord compression, or cauda equina symptoms.
Patients with suspected fracture, infection, malignancy, severe instability, significant osteoporosis risk, acute spinal-cord findings, cauda equina symptoms, or other contraindications may need a different approach or urgent referral.
Seek urgent medical care for new bowel or bladder dysfunction, saddle numbness, rapidly worsening weakness, severe trauma, fever with severe spinal pain, or sudden loss of coordination or walking ability.
