Disc herniation and its causes, symptoms and treatment

What is Disc Herniation

Disc herniation is a condition of the spine where a nucleus pulposus is displaced from intervertebral space. Nucleus pulposus is the inner space of the vertebral disc. It is made up of jelly like material that consists of mainly water, as well as loose network of collagen fibers. Spinal discs act as a shock absorber present between the vertebra, the specialized bones that make the spinal column. Intervertebral disc simply means the disc between the two vertebrae. Discs act as a tough ligament that hold the vertebra together, allow mobility and helps for weight bearing. Between 60% and 80% of people will experience low back pain at some point their lives. Some of these people will have low back pain and leg pain caused by a herniated disk.

Causes of disc herniation

There are many causes of a herniated disc. It can often the result of daily wear and tear on the spine, called degeneration. When the weight carried by back distributed to the intervertebral discs due to the movement such as walking, twisting and bending, the vertebras disc can become worn out over the course of time. Other cause includes a sudden traumatized injury to the spine either a jerking movement that can put too much pressure on the disc, lifting a heavy object incorrectly and/or twisting the body inappropriately.

Stages of disc herniation

There are four stages of disc herniation. First stage is disc bulging or early degeneration where the nucleus pulposus weakens due to the chemical changes in the disc. The disc become less able to absorb the shock of the movement and leads to instability in the intervertebral joint. Second stage is Prolapse, the position of the disc changes. Protrusion or bulging of the nucleus pulposus begins to form. It may or may not affect the spinal cord and nerves depending on the bulging and protrusion. Third stage is called extrusion, in this stage gel-like nucleus pulposus breaks through the annular fibrosis (outer layer of the disc) but it still remains within the disc. Fourth stage is Sequestration, in this  stage, the nucleus pulposus breaks through the annulus fibrosus and affect the spinal cord and nerve.

Risk factors of disc herniation

Carrying excess weight is an important risk factor for disc herniation due to the extra pressure on the spine, causing disc to bulge and irritating the nerve roots. Standing or sitting for prolonged period of time can increase the chances the wear and tear on your spine and increase the risk of disc herniation. Sedentary lifestyle can increase the risk of back problems due to inappropriate pressure added on the spine. Previous history of herniated disc can also increase the risk of recurring.

Signs/Symptoms of disc herniation

Disc herniation can be present in any part of the spine either cervical, thoracic or lumbar spine.  The lumbar spine (lower back) is one of the most common areas for disc herniation. It can add extra pressure on the nerves and muscles attached to the area of the spine. The symptoms of disc herniation involve:

Pain and numbness( most common on one side of the body), pain that extends to the arms or legs (depending the spinal nerve impinged), pain worsens at night or with sudden movement, pain that worsens after prolonged sitting or standing, unexplained muscle weakness, tingling, aching or burning sensation in the affected nerve area.

Diagnosis

To diagnose the disc herniation, health care provider will review the history and perform physical examination. The test may involve orthopaedic and neurological testing. The function of the nerve and muscle testing will be examined. Radiography Imaging will be utilized to view the bones and muscles of the spine and look for any affected areas. These imaging modalities include X-rays, CT scans, MRI scans and Discograms.

Complications

Untreated or severe disc herniation may cause permanent nerve damage. It can lead to condition such as cauda equina syndrome. In this condition, nerves supplying to the legs and pelvis can get interfered and lead to loss of control for bowel or bladder. Another complication may include saddle anaesthesia which can cause sensation loss in the inner thighs, back of the legs and around the rectum.

Treatment

Treatment for a disc herniation can range from conservative to surgical procedure. People usually consider physiotherapist, Chiropractic or acupuncturist treatment to resolve the complaint initially. The goal of care mainly depends to stretch or strengthen the back and surrounding muscles. Avoiding the activity such as heavy lifting, prolonged sitting or standing helps to alleviate the symptoms. Doing regular, moderate-intensity exercise is also vital for strengthening the structures that support the spine and for keeping the spine healthy. Getting at least 150 minutes of physical activity each week helps maintain the integrity of the musculoskeletal system. Maintaining proper hydration and staying flexible also keep your body strong and healthy and slows wear and tear on your body. Muscle relaxants, narcotics and nerve pain medications can also be prescribed.  If the symptoms do not subside between 8 weeks, surgery would be recommended which remove the damaged or protruding portion of the disc. In other cases, laminectomy and spinal fusion can also be performed to add stability to the spinal column.

Chiropractic Management

Chiropractic care helps to address pain and other associated symptoms. Chiropractors utilise orthopaedic, neurological exams and radiography imaging to check the reflexes, muscle strength and loss of any nerve function. Chiropractors evaluate the functioning of the spine as one area of the spine can influence other part of the spine and/or body. The treatment will involve chiropractic spinal adjustment and other techniques to ease the muscles and symptoms of herniated disc. A gentle low force technique is usually applied on the herniated disc. Chiropractic care is safe and effective for most patients. So, if you know someone who is suffering from herniated disc, do not hesitate to visit your chiropractor and ask any further questions.