Herniated Disk: Symptoms and Treatment |
Herniated discs can occur in any part of the spine. Herniated discs are more common in the lower back (lumbar spine), but also occur in the neck (cervical spine). The area in which pain is experienced depends on what part of the spine is affected.
A herniated disk refers to a problem
with one of the rubbery cushions (disks) that sit between the bones (vertebrae)
that stack to make your spine.
A spinal disk has a soft, jellylike
center (nucleus) encased in a tougher, rubbery exterior (annulus). Sometimes
called a slipped disk or a ruptured disk, a herniated disk occurs when some of
the nuclei push out through a tear in the annulus.
A herniated disk, which can occur in
any part of the spine, most often occurs in the lower back. Depending on where
the herniated disk is, it can result in pain, numbness, or weakness in an arm
or leg.
Many people have no symptoms from a
herniated disk. For people who do have symptoms, the symptoms tend to improve
over time. Surgery is usually not necessary to relieve the problem.
Symptoms of Herniated Disk
Most herniated disks occur in the lower
back, but they can also occur in the neck. Signs and symptoms depend on where
the disk is situated and whether the disk is pressing on a nerve. Herniated
disks usually affect one side of the body.
- Arm or
leg pain. If
your herniated disk is in your lower back, besides pain in your lower
back, you'll typically feel pain in your buttocks, thigh, and calf. You
might have pain in part of the foot as well.
For a herniated disk in your neck,
you'll typically feel the most pain in your shoulder and arm. This pain might
shoot into your arm or leg when you cough, sneeze, or move into certain
positions. Pain is often described as sharp or burning.
- Numbness
or tingling. People
who have a herniated disk often have radiating numbness or tingling in the
body part served by the affected nerves.
- Weakness. Muscles
served by the affected nerves tend to weaken. This can cause you to
stumble, or affect your ability to lift or hold items.
You can have a herniated disk without
symptoms. You might not know you have it unless it shows up on a spinal image.
When to see a doctor
Seek medical attention if your neck or back pain
travels down your arm or leg, or if you also have numbness, tingling, or
weakness.
Causes of Herniated Disk
Disk
herniation is most often the result of gradual, aging-related wear and tear
called disk degeneration. As people age, the disks become less flexible and
more prone to tearing or rupturing with even a minor strain or twist.
Most
people can't pinpoint the cause of their herniated disk. Sometimes, using the
back muscles instead of the leg and thigh muscles to lift heavy objects can
lead to a herniated disk, as can twisting and turning while lifting. Rarely, a
traumatic event such as a fall or a blow to the back is the cause.
Risk factors of Herniated Disk
Factors that can increase the risk of a
herniated disk include:
- Weight. Excess
body weight causes extra stress on the disks in the lower back.
- Occupation. People
with physically demanding jobs have a greater risk of back problems.
Repetitive lifting, pulling, pushing, bending sideways, and twisting also
can increase the risk of a herniated disk.
- Genetics. Some
people inherit a predisposition to developing a herniated disk.
- Smoking. It's
thought that smoking lessens the oxygen supply to disks, causing them to
break down more quickly.
- Frequent
driving. Being
seated for long periods combined with the vibration from the motor vehicle
engine can put pressure on the spine.
- Being
sedentary. Regular
exercise can help prevent a herniated disk.
Complications of Herniated Disk
Just above your waist, your spinal cord
ends. What continues through the spinal canal is a group of long nerve roots
that resemble a horse's tail (cauda equina).
Rarely, disk herniation can compress
the entire spinal canal, including all the nerves of the cauda equina. In rare
instances, emergency surgery might be required to avoid permanent weakness or
paralysis.
Seek emergency medical attention if you
have:
- Worsening
symptoms. Pain,
numbness, or weakness can increase to the point that they hamper your daily
activities.
- Bladder
or bowel dysfunction. Cauda equina syndrome can cause
incontinence or difficulty urinating even with a full bladder.
- Saddle
anesthesia. This
progressive loss of sensation affects the areas that would touch a saddle
— the inner thighs, the back of the legs, and the area around the rectum.
Prevention of Herniated Disk
To help prevent a herniated disk, do
the following:
- Exercise. Strengthening
the trunk muscles stabilizes and supports the spine.
- Maintain
good posture. This
reduces pressure on your spine and disks. Keep your back straight and
aligned, particularly when sitting for long periods. Lift heavy objects
properly, making your legs — not your back — do most of the work.
- Maintain
a healthy weight. Excess weight puts more pressure on the
spine and disks, making them more susceptible to herniation.
- Quit
smoking. Avoid
the use of any tobacco products.
Diagnosis of Herniated Disk
During the physical exam, your doctor
will check your back for tenderness. You might be asked to lie flat and move
your legs into various positions to help determine the cause of your pain.
Your doctor may also perform a
neurological exam to check your:
- Reflexes
- Muscle
strength
- Walking
ability
- Ability
to feel light touches, pinpricks, or vibration
In most cases of a herniated disk, a
physical exam and medical history are all that is needed for a diagnosis. If
your doctor suspects another condition or needs to see which nerves are
affected, he or she may order one or more of the following tests.
Imaging tests
- X-rays. Plain
X-rays don't detect herniated disks, but they can rule out other causes of
back pain, such as an infection, tumor, spinal alignment issues, or a
broken bone.
- CT
scan. A
CT scanner takes a series of X-rays from different directions and then
combines them to create cross-sectional images of the spinal column and
the structures around it.
- MRI. Radio
waves and a strong magnetic field are used to create images of the body's
internal structures. This test can be used to confirm the location of the
herniated disk and to see which nerves are affected.
- Myelogram. A dye
is injected into the spinal fluid before a CT scan is taken. This test can
show pressure on the spinal cord or nerves due to multiple herniated disks
or other conditions.
Nerve tests
Electromyograms and nerve conduction
studies measure how well electrical impulses are moving along nerve tissue.
This can help pinpoint the location of nerve damage.
- Nerve
conduction study. This test measures electrical nerve
impulses and functioning in the muscles and nerves through electrodes
placed on the skin. The study measures the electrical impulses in nerve
signals when a small current passes through the nerve.
- Electromyography
(EMG). During
an EMG, a doctor inserts a needle electrode through the skin into
various muscles. The test evaluates the electrical activity of muscles
when contracted and when at rest.
Treatment of Herniated Disk
Conservative treatment — mainly
modifying activities to avoid movement that causes pain and taking pain
medication — relieves symptoms in most people within a few days or weeks.
Medications of Herniated Disk
- Nonprescription
pain medications. If your pain is mild to moderate, your
doctor might recommend pain medication available without a prescription,
such as acetaminophen (Tylenol, others) ibuprofen (Advil, Motrin IB,
others), or naproxen sodium (Aleve).
- Neuropathic
drugs. These
drugs affect nerve impulses to decrease pain. They include gabapentin
(Gralise, Horizant, Neurontin), pregabalin (Lyrica), duloxetine (Cymbalta,
Drizalma Sprinkle), or venlafaxine (Effexor XR).
- Muscle
relaxers. You
might be prescribed these if you have muscle spasms. Sedation and
dizziness are common side effects.
- Opioids. Because
of the side effects of opioids and the potential for addiction, many
doctors hesitate to prescribe them for disk herniation. If other medications
don't relieve your pain, your doctor might consider short-term use of
opioids, such as codeine or an oxycodone-acetaminophen combination
(Percocet, Oxycet). Sedation, nausea, confusion, and constipation are
possible side effects of these drugs.
- Cortisone
injections. If
your pain doesn't improve with oral medications, your doctor might
recommend a corticosteroid that can be injected into the area around the
spinal nerves. Spinal imaging can help guide the needle.
Therapy
Your doctor might suggest physical
therapy to help with your pain. Physical therapists can show you positions and
exercises designed to minimize the pain of a herniated disk.
Surgery
Few people with herniated disks require
surgery. Your doctor might suggest surgery if conservative treatments fail to
improve your symptoms after six weeks, especially if you continue to have:
- Poorly
controlled pain
- Numbness
or weakness
- Difficulty
standing or walking
- Loss
of bladder or bowel control
In nearly all cases, surgeons can
remove just the protruding portion of the disk. Rarely, does the entire disk must be
removed. In these cases, the vertebrae might need to be fused with a bone
graft.
To allow the process of bone fusion,
which takes months, metal hardware is placed in the spine to provide spinal
stability. Rarely, your surgeon might suggest the implantation of an artificial
disk.
Lifestyle and home remedies
Besides taking the pain medications
your doctor recommends, try:
- Applying
heat or cold. Initially,
cold packs can be used to relieve pain and inflammation. After a few days,
you might switch to a gentle heat to give relief and comfort.
- Avoiding
too much bed rest. Staying in bed can lead to stiff joints
and weak muscles — which can complicate your recovery. Instead, rest in a
position of comfort for 30 minutes, and then go for a short walk or do
some work. Try to avoid activities that worsen your pain.
- Resuming
activity slowly. Let
your pain guide you in resuming your activities. Make sure your movements
are slow and controlled, especially bending forward and lifting.
Alternative Medicine of Herniated Disk
Some alternative and complementary
medicine treatments might help ease chronic back pain. Examples include:
- Chiropractic. Spinal
manipulation has been found to be moderately effective for low back pain
that has lasted for at least a month. Rarely, chiropractic treatment of
the neck can cause certain types of strokes.
- Acupuncture. Although
results are usually modest, acupuncture appears to ease chronic back and
neck pain.
- Massage. This
hands-on therapy can provide short-term relief to people dealing with
chronic low back pain.
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