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|Classification and external resources|
Different regions (curvatures) of the vertebral column
The pain can often be divided into neck pain, upper back pain, lower back pain or tailbone pain. It may have a sudden onset or can be a chronic pain; it can be constant or intermittent, stay in one place or radiate to other areas. It may be a dull ache, or a sharp or piercing or burning sensation. The pain may be radiate into the arm and hand), in the upper back, or in the low back, (and might radiate into the leg or foot), and may include symptoms other than pain, such as weakness, numbness or tingling.
Back pain is one of humanity's most frequent complaints. In the U.S., acute low back pain (also called lumbago) is the fifth most common reason for physician visits. About nine out of ten adults experience back pain at some point in their life, and five out of ten working adults have back pain every year.
The spine is a complex interconnecting network of nerves, joints, muscles, tendons and ligaments, and all are capable of producing pain. Large nerves that originate in the spine and go to the legs and arms can make pain radiate to the extremities.
- 1 Classification
- 2 Associated conditions
- 3 Underlying sources and causes
- 4 Management
- 5 Pregnancy
- 6 Economics
- 7 Research
- 8 See also
- 9 References
- 10 External links
By its duration: acute (less than 4 weeks), subacute (4 – 12 weeks), chronic (greater than 12 weeks).
By its cause: MSK, infectious, cancer, etc.
Back pain can be a sign of a serious medical problem, although this is not most frequently the underlying cause:
- Typical warning signs of a potentially life-threatening problem are bowel and/or bladder incontinence or progressive weakness in the legs.
- Severe back pain (such as pain that is bad enough to interrupt sleep) that occurs with other signs of severe illness (e.g. fever, unexplained weight loss) may also indicate a serious underlying medical condition.
- Back pain that occurs after a trauma, such as a car accident or fall may indicate a bone fracture or other injury.
- Back pain in individuals with medical conditions that put them at high risk for a spinal fracture, such as osteoporosis or multiple myeloma, also warrants prompt medical attention.
- Back pain in individuals with a history of cancer (especially cancers known to spread to the spine like breast, lung and prostate cancer) should be evaluated to rule out metastatic disease of the spine.
Back pain does not usually require immediate medical intervention. The vast majority of episodes of back pain are self-limiting and non-progressive. Most back pain syndromes are due to inflammation, especially in the acute phase, which typically lasts for two weeks to three months.
A few observational studies suggest that two conditions to which back pain is often attributed, lumbar disc herniation and degenerative disc disease may not be more prevalent among those in pain than among the general population, and that the mechanisms by which these conditions might cause pain are not known. Other studies suggest that for as many as 85% of cases, no physiological cause can be shown.
A few studies suggest that psychosocial factors such as on-the-job stress and dysfunctional family relationships may correlate more closely with back pain than structural abnormalities revealed in x-rays and other medical imaging scans.
Underlying sources and causes
There are several potential sources and causes of back pain. However, the diagnosis of specific tissues of the spine as the cause of pain presents problems. This is because symptoms arising from different spinal tissues can feel very similar and is difficult to differentiate without the use of invasive diagnostic intervention procedures, such as local anesthetic blocks.
One potential source of back pain is skeletal muscle of the back. Potential causes of pain in muscle tissue include Muscle strains (pulled muscles), muscle spasm, and muscle imbalances. However, imaging studies do not support the notion of muscle tissue damage in many back pain cases, and the neurophysiology of muscle spasm and muscle imbalances are not well understood.
Another potential source of low back pain is the synovial joints of the spine (e.g. zygapophysial joints). These have been identified as the primary source of the pain in approximately one third of people with chronic low back pain, and in most people with neck pain following whiplash. However, the cause of zygapophysial joint pain is not fully understood. Capsule tissue damage has been proposed in people with neck pain following whiplash. In people with spinal pain stemming from zygapophysial joints, one theory is that intra-articular tissue such as invaginations of their synovial membranes and fibro-adipose meniscoids (that usually act as a cushion to help the bones move over each other smoothly) may become displaced, pinched or trapped, and consequently give rise to nociception.
There are several common other potential sources and causes of back pain: these include spinal disc herniation and degenerative disc disease or isthmic spondylolisthesis, osteoarthritis (degenerative joint disease) and spinal stenosis, trauma, cancer, infection, fractures, and inflammatory disease.
Radicular pain (sciatica) is distinguished from 'non-specific' back pain, and may be diagnosed without invasive diagnostic tests.
New attention has been focused on non-discogenic back pain, where patients have normal or near-normal MRI and CT scans. One of the newer investigations looks into the role of the dorsal ramus in patients that have no radiographic abnormalities. See Posterior Rami Syndrome.
The management goals when treating back pain are to achieve maximal reduction in pain intensity as rapidly as possible; to restore the individual's ability to function in everyday activities; to help the patient cope with residual pain; to assess for side-effects of therapy; and to facilitate the patient's passage through the legal and socioeconomic impediments to recovery. For many, the goal is to keep the pain to a manageable level to progress with rehabilitation, which then can lead to long term pain relief. Also, for some people the goal is to use non-surgical therapies to manage the pain and avoid major surgery, while for others surgery may be the quickest way to feel better.
Not all treatments work for all conditions or for all individuals with the same condition, and many find that they need to try several treatment options to determine what works best for them. The present stage of the condition (acute or chronic) is also a determining factor in the choice of treatment. Only a minority of back pain patients (most estimates are 1% - 10%) require surgery. And, for all forms of spinal surgery, one of the common complications universally reported is "next disc syndrome". Presumably, once the affected disc is surgically compromised, then gravity shifts its effects to the next higher disc, and that one commences a more rapid degenerative course.
- Use of medications, such as muscle relaxants, opioids, non-steroidal anti-inflammatory drugs (NSAIDs/NSAIAs) or paracetamol (acetaminophen). A meta-analysis of randomized controlled trials by the Cochrane Collaboration found that there is insufficient clinical trials to determine if injection therapy, usually with corticosteroids, helps in cases of low back pain A study of intramuscular corticosteroids found no benefit.
General notes about referral to Chiropractic care
Chiropractors, pursuant to the laws of most States, and under Federal programs, are physicians, trained (in five academic year graduate programs) to perform their own physical, orthopedic, and neurological examinations, take and interpret laboratory tests, and radiological examinations. A competent DC will not undertake to treat a patient until s/he has completed his/her own evaluation.
Chiropractors may elect to combine manipulative therapy with any of the common physio-therapeutic modalities here below described, to facilitate healing, decrease swelling and/or reduce inflammation. And, they will normally cooperate well with the allopathic or osteopathic physician who is willing to provide concomitant medication for pain and or inflammation in the acute stage of care.
Ethics of referral for MD's and DO's
Pursuant to the Court ruling in Wilk v American Medical Association (et al), all AMA members and under rules of the Joint Commission on Accreditation of Hospitals allow referral and close collaboration with Doctors of Chiropractic.
Chiropractic v Generic Manipulation methods
- Chiropractic manipulation, as provided by an appropriately trained and qualified chiropractor: I.e., studies published in the British Medical Journal in 1990 involving 741 patients under Chiropractic care, and in a follow-up in 1995 also in the BMJ, which specifically utilized Chiropractic techniques (high velocity, low intensity) manipulation showed it was vastly better than any other method of treating back pain.
- Generic Joint manipulation (high intensity, low velocity), in newer studies, but in which the therapy was performed by osteopaths, physical therapists, or a physiatrist showed equivocal benefits over any other method of treatment. Studies of the effect of manipulation suggest that this approach has a benefit similar to other therapies and superior to placebo.
Contraindications to Chiropractic referral
NB: The only universal contraindications to referral to Chiropractic services are:
- active fracture
- Physical therapy consisting of generic manipulation and exercise, including stretching and strengthening (with specific focus on the muscles which support the spine). 'Back schools' have shown benefit in occupational settings. The Schroth method, a specialized physical exercise therapy for scoliosis, kyphosis, spondylolisthesis, and related spinal disorders, has been shown to reduce severity and frequency of back pain in adults with scoliosis.
- Heat therapy is useful for back spasms or other conditions. A meta-analysis of studies by the Cochrane Collaboration concluded that heat therapy can reduce symptoms of acute and sub-acute low-back pain. Some patients find that moist heat works best (e.g. a hot bath or whirlpool) or continuous low-level heat (e.g. a heat wrap that stays warm for 4 to 6 hours).
- Cold compression therapy (e.g. ice or cold pack application) may be effective at relieving back pain in some cases.
- Massage therapy, especially from an experienced therapist, can provide short term relief. Acupressure or pressure point massage may be more beneficial than classic (Swedish) massage.
- Cold compression therapy is advocated for a strained back or chronic back pain and is postulated to reduce pain and inflammation, especially after strenuous exercise such as golf, gardening, or lifting. However, a meta-analysis of randomized controlled trials by the Cochrane Collaboration concluded "The evidence for the application of cold treatment to low-back pain is even more limited, with only three poor quality studies located. No conclusions can be drawn about the use of cold for low-back pain"
- Electrotherapy, such as a transcutaneous electrical nerve stimulation (TENS) has been proposed. Two randomized controlled trials found conflicting results. This has led the Cochrane Collaboration to conclude that there is inconsistent evidence to support use of TENS. In addition, spinal cord stimulation, where an electrical device is used to interrupt the pain signals being sent to the brain and has been studied for various underlying causes of back pain.
- Inversion therapy alone, is useful for temporary back relief due to the traction method or spreading of the back vertebres through (in this case) gravity. The patient hangs in an upside down position for a period of time from ankles or knees until this separation occurs. The effect can be achieved without a complete vertical hang ( 90 degree) and noticeable benefits can be observed at angles as low as 10 to 45 degrees.
Other Conservative treatments
- Exercises can be an effective approach to reducing pain, but should be done under supervision of a licensed health professional, especially a physical therapist, chiropractor, osteopath or physiatrist. Generally, some form of consistent stretching and exercise is believed to be an essential component of most back treatment programs. However, one study found that exercise is also effective for chronic back pain, but not for acute pain. Another study found that back-mobilizing exercises in acute settings are less effective than continuation of ordinary activities as tolerated.
- A randomized control trial, published in the British Medical Journal, found that the The Alexander Technique provided long term benefits for patients with chronic back pain.. A subsequent review concluded that 'a series of six lessons in Alexander technique combined with an exercise prescription seems the most effective and cost effective option for the treatment of back pain in primary care'.
- Acupuncture has some proven benefit for symptomatic relief of back pain ; however, a recent randomized controlled trial suggested insignificant difference between real and sham acupuncture .
- Education, and attitude adjustment to focus on psychological or emotional causes - respondent-cognitive therapy and progressive relaxation therapy can reduce chronic pain.
Surgery may sometimes be appropriate for patients with:
- Lumbar disc herniation or degenerative disc disease
- Spinal stenosis from lumbar disc herniation, degenerative joint disease, or spondylolisthesis
- Compression fracture
Of doubtful benefit
- Bed rest is rarely recommended as it can exacerbate symptoms, and when necessary is usually limited to one or two days. Prolonged bed rest or inactivity is actually counterproductive, as the resulting stiffness leads to more pain.
About 50% of women experience low back pain during pregnancy. Back pain in pregnancy may be severe enough to cause significant pain and disability and pre-dispose patients to back pain in a following pregnancy. No significant increased risk of back pain with pregnancy has been found with respect to maternal weight gain, exercise, work satisfaction, or pregnancy outcome factors such as birth weight, birth length, and Apgar scores.
Biomechanical factors of pregnancy that are shown to be associated with low back pain of pregnancy include abdominal sagittal and transverse diameter and the depth of lumbar lordosis. Typical factors aggravating the back pain of pregnancy include standing, sitting, forward bending, lifting, and walking. Back pain in pregnancy may also be characterized by pain radiating into the thigh and buttocks, night-time pain severe enough to wake the patient, pain that is increased during the night-time, or pain that is increased during the day-time.
The avoidance of high impact, weight-bearing activities and especially those that asymmetrically load the involved structures such as: extensive twisting with lifting, single-leg stance postures, stair climbing, and repetitive motions at or near the end-ranges of back or hip motion can easen the pain. Direct bending to the ground without bending the knee causes severe impact on the lower back in pregnancy and in normal individuals, which leads to strain, especially in the lumbo-saccral region that in turn strains the multifidus.
Back pain is regularly cited by national governments as having a major impact on productivity, through loss of workers on sick leave. Some national governments, notably Australia and the United Kingdom, have launched campaigns of public health awareness to help combat the problem, for example the Health and Safety Executive's Better Backs campaign. In the United States lower back pain’s economic impact reveals that it is the number one reason for individuals under the age of 45 to limit their activity, second highest complaint seen in physician’s offices, fifth most common requirement for hospitalization, and the third leading cause for surgery.
- Vertebroplasty involves the percutaneous injection of surgical cement into vertebral bodies that have collapsed due to compression fractures has been found to be ineffective in the treatment of compression fractures of the spine.
- The use of specific biologic inhibitors of the inflammatory cytokine tumor necrosis factor-alpha may result in rapid relief of disc-related back pain. 
There are many clinical trials sponsored both by industry and the National Institutes of Health. Clinical trials sponsored by the National Institutes of Health related to back pain can be viewed at NIH Clinical Back Pain Trials.
Pain is subjective and is impossible to test objectively. There are no clinical tests that can be objectively verified. Clinical test utilize the patient's report o pain severity on a scale of 1 to 10. Sometimes and particularly with children a series of emoticons are presented to the patient and the subject is asked to point to an emoticon. Even though some clinical trials succeed in getting regulatory approval for products this is not a proof that this therapy is more effective or even has a benefit. All the tests rely on the patient's perception. The doctor can not verify whether 5 is a more appropriate score than 1 or 10 nor determine if one patient's 5 is comparable to another patient's rating of 5.
A 2008 randomized controlled trial found marked improvement in addressing back pain with The Alexander Technique. Exercise and a combination of 6 lessons of AT reduced back pain 72% as much as 24 AT lessons. Those receiving 24 lessons had 18 fewer days of back pain than the control median of 21 days.
- Failed back syndrome
- Low back pain
- Posterior Rami Syndrome
- Tension myositis syndrome
- Upper back pain
- Pregnancy related pelvic girdle pain
- Spinal stenosis
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