What is Sciatica?

Sciatica is a painful condition that is caused by pressure or damage to the sciatic nerve or an associated nerve in the lower back and spinal area. It’s a common misunderstanding to label any low back pain or shooting leg pain as sciatica. However, sciatica refers specifically to pain that comes directly from issues with the sciatic nerve or its root nerves. This nerve is quite large, with a diameter of up to 2 cm, and includes nerve roots from the lower lumbar area to the lower sacrum area. Movements such as bending, twisting your back, or coughing can make the pain worse.

The sciatic nerve is very important as it controls the hamstring muscles and the muscles that pull the legs together. It also indirectly controls the muscles of the calf, front of the lower leg, and some foot muscles. In addition to controlling these muscles, its ends help with feeling in the back and side of the lower leg and the sole of the foot. Sciatica most often comes from an inflammatory condition that irritates the sciatic nerve. On the other hand, direct pressure on the nerve can cause more noticeable muscle problems, and if this happens, a detailed and speedy diagnosis is needed.

What Causes Sciatica?

Sciatica is a condition that arises when the sciatic nerve, which runs down your lower back to your feet, is pinched or irritated. This can happen due to various structural issues. The most frequent cause of sciatica is a herniated or bulging disc in the lower spine. In simpler terms, think of this as a cushion between your spinal bones slipping out of place, which, in turn, pinches the sciatic nerve.

In older people, a condition called lumbar spinal stenosis can lead to sciatica. This means that the spaces within the spine in the lower back become narrow, putting pressure on the nerves.

Another condition called spondylolisthesis, which is a misalignment of the vertebrae or spinal bones, can also cause these symptoms.

Additionally, muscle spasms or inflammation in the lower back or pelvic area can squeeze a nerve root in the lower back or sacrum, which subsequently might lead to sciatica.

A mass or lump located near the spine, including serious conditions like cancer, a blood clot (epidural hematoma), or a pocket of infection (epidural abscess), can also squeeze the nerve and bring about sciatica symptoms.

Risk Factors and Frequency for Sciatica

Sciatica, a condition affecting the sciatic nerve, has some unique characteristics in terms of who it affects and when. It doesn’t favor any particular gender and tends to be most common in people in their 40s. It’s also likely to affect between 10% to 40% of people at some point in their lives, with 1% to 5% of people developing it each year.

Interestingly, body height doesn’t seem to be a factor unless a person is between 50 and 60 years old. It’s also not common in people under 20, unless it’s caused by an injury. There are some evidence suggesting that genetics may play a role. In terms of lifestyle factors, certain types of physical activity can either increase or decrease the risk, depending on whether a person has had sciatic symptoms before. And there are certain jobs – like machine operators, truck drivers, and those requiring physically awkward positions – that may increase the likelihood of developing Sciatica.

  • Sciatica doesn’t favor any particular gender.
  • The majority of cases appear in people in their 40s.
  • About 10% to 40% of people will experience it in their lifetime.
  • It affects 1% to 5% of the population annually.
  • Body height doesn’t usually play a role, except for people aged 50 to 60.
  • It’s rare in people under 20 unless it’s due to an injury.
  • There is some evidence suggesting a genetic link.
  • Physical activity can increase or decrease the risk, depending on previous sciatic symptoms.
  • Certain occupations, including machine operators and truck drivers or jobs requiring awkward positioning, may increase the risk.

Signs and Symptoms of Sciatica

Sciatica is a condition where pain is experienced along the path of the sciatic nerve. It often begins in the lower back and radiates down the affected leg. Some people describe it as a burning sensation with accompanying deep pain in the buttocks. Occasionally, a person may say that the affected leg feels “heavy”, which might indicate some level of weakness.

A common test for sciatica is the straight-leg raise. This test is performed while the patient is lying on their back. The doctor will raise the patient’s leg, keeping it straight at the knee. The test is most likely pointing to a herniated lumbar Disc if pain is felt between 30° and 70° of the hip being flexed and is predominantly in the back. If pain and an abnormal sensation is felt in the leg, it can be an indication that a peripheral nerve is being compressed. If pain is reproduced above 70° of flexion or below 30°, the cause is generally thought to be musculoskeletal and not related to herniation.

There are variants on the straight-leg raise test that can help to clarify the diagnosis. One adapted version is the crossed straight leg test. In this version, the test is conducted on the leg that doesn’t have symptoms. If pain is reported in the leg with symptoms while the other leg is raised to a 40° angle, it could indicate a central disc herniation with severe nerve irritation. There are also other signs that are specific to the nerve root being affected, such as certain types of weakness or altered reflexes that correspond to the area of the body supplied by that particular nerve.

  • L3 radiculopathy: Features weakness of hip adduction, knee extension, and sensory pain in the front and inside of the thigh.
  • L4 radiculopathy: Presents with ankle dorsiflexion weakness and an absent patellar reflex.
  • L5 radiculopathy: Is indicated by hip abduction and big toe extension weakness.
  • S1 nerve root compression: Is characterized by absent ankle reflexes.

Testing for Sciatica

Sciatica is diagnosed primarily by understanding your medical history and conducting a comprehensive physical examination. At the beginning, imaging tests like X-rays or scans usually aren’t necessary. However, if there’s a concern about a spinal fracture or a condition called spondylolisthesis (slipping of a vertebra), your doctor may ask for plain films of the lumbosacral spine, the lower part of your back. If these films don’t show anything, a non-contrast CT scan (a type of X-ray that shows detailed images of your body) may be used to check for a fracture.

If your pain lasts for 6 to 8 weeks despite treatment, imaging tests might be needed to figure out what’s going on. In these situations, magnetic resonance imaging (MRI) is typically the preferred method. MRI uses a powerful magnetic field and radio waves to create detailed images of your body. It can help locate the source of the pain and determine if there’s a pressing need for surgery.

An MRI will also be done right away if neurological symptoms like numbness, weakness, or tingling in your legs are present, or if there’s suspicion of a ‘mass effect,’ meaning something is pressing on your nerves or spinal cord. Remember, an MRI is the gold standard in determining the exact cause of the pain and making sure surgical treatment is not urgently needed.

Treatment Options for Sciatica

Here are some helpful tips to manage pain caused by sciatica:

Self-care recommendations:

  • Use heat pads or ice packs to comfort the area and reduce swelling.
  • Avoid activities that worsen your pain or sitting or standing for prolonged periods.
  • Maintain a straight, upright posture.
  • Do exercises that make your core muscles stronger.
  • Gently stretch your lower back and the back of your thighs.
  • Regularly engage in light exercises like walking, swimming, or water-based therapies.
  • Always use the correct lifting techniques to prevent further injury.

Medical treatments:

  • Short-term use of oral nonsteroidal anti-inflammatory drugs, known as NSAIDs these may help alleviate pain.
  • Opioid and non-opioid painkillers may also be recommended.
  • Muscle relaxants can provide relief.
  • Anticonvulsants could be recommended for nerve-related pain.
  • If NSAIDs aren’t enough, oral steroids may be beneficial.
  • Local steroid injections may be offered.
  • Spinal manipulation, a type of physical therapy, could be useful.
  • Deep tissue massage may provide relief.
  • Consulting with a physical therapist can provide additional exercises or treatments.
  • Patients may need to be evaluated for surgery to correct any structural issues in the back such as disc herniation, epidural hematoma, epidural abscess, or tumor.
  • Acupuncture, a traditional Chinese medicine practice, can also be a useful treatment.

When trying to identify the cause of sciatica, which is a painful condition that affects the nerve running down the back of each leg, doctors consider various possibilities that could contribute to the condition. Some of these include:

  • Herniation of a disc in the lower back (lumbosacral disc)
  • Muscle spasms
  • Impingement (pressure or squeezing) of the nerve root
  • An abscess (a collection of pus) in the epidural space around your spinal cord
  • A blood clot (hematoma) in the epidural space around your spinal cord
  • Tumors
  • Pott’s disease, also known as spinal tuberculosis
  • Piriformis syndrome

Piriformis syndrome is significant because this condition often goes unrecognized or is misdiagnosed. The piriformis is a muscle in the buttock area, and injury or inflammation of this muscle can cause symptoms similar to sciatica. Commonly caused by overuse, like in running or other endurance sports, piriformis syndrome can be identified during specific physical examination maneuvers and can be treated with rest, stretches, and manipulations of particular areas of the spine.

In the case of a herniated lumbosacral disc, a detailed neurological examination can pinpoint the level of the herniation and determine the type of nerve root pain (radiculopathy) experienced. Depending on where it occurs, different nerve roots can be affected. A straight leg raise test can be instrumental in diagnosing this.

Spondylolisthesis is a condition where one of the vertebrae in your spine slips forward over the one below it. There are mainly five types of this disease, each impacted by different causative factors. Depending on severity, different nerve roots can be compressed. X-rays are typically used to diagnose spondylolisthesis.

Spinal stenosis is a disease resulting from the narrowing of the spinal canal or openings where nerves leave the spinal cord, which can compress the nerves and cause pain. Several factors can cause this narrowing. To diagnose spinal stenosis, doctors typically use imaging techniques like x-rays and MRI scans.

Pott disease (spinal tuberculosis) can also cause back pain and even nerve pain. Pain at rest is a hallmark sign, and sometimes nerve pain can also be reported. Sometimes, the disease can cause other general symptoms, like weight loss, fever, and fatigue. With the progression of the disease, there can be spinal instability, exaggerated reflexes, motor deficits, and sensory loss. This disease is typically diagnosed using various tests and imaging techniques.

What to expect with Sciatica

In most cases, sciatica, a condition that causes pain in the lower back and/or hip that radiates down the leg, usually gets better in under 4 to 6 weeks, even without medical treatment. There are no long-term complications in these cases. However, in instances where the condition is more severe or comes along with other neurological symptoms, recovery might take a bit longer. Don’t worry though, recovery rates are still very high.

There are certain factors that have been found to increase the likelihood of sciatica coming back or becoming chronic. Some research indicates that individuals who have poor workplace ergonomics (for example, incorrect posture), are suffering from depression, or are in challenging socioeconomic situations are at a higher risk.

Possible Complications When Diagnosed with Sciatica

Sciatica is caused by pressure on the sciatic nerve. If steps aren’t taken to alleviate this pressure, complications can arise. Here are the potential problems that can occur if pressure on the sciatic nerve isn’t addressed:

  • Increasing pain over time
  • Numbness or a prickling sensation in the leg that’s affected
  • Loss of muscle strength in the leg that’s affected
  • Loss of control over bowel or bladder
  • Lasting nerve damage
Frequently asked questions

In most cases, sciatica usually gets better in under 4 to 6 weeks, even without medical treatment. There are no long-term complications in these cases. However, in instances where the condition is more severe or comes along with other neurological symptoms, recovery might take a bit longer. Recovery rates are still very high.

Sciatica can be caused by various factors such as a herniated or bulging disc in the lower spine, lumbar spinal stenosis, spondylolisthesis, muscle spasms or inflammation in the lower back or pelvic area, and the presence of a mass or lump near the spine.

Signs and symptoms of sciatica include: - Pain along the path of the sciatic nerve, which often starts in the lower back and radiates down the affected leg. - Burning sensation and deep pain in the buttocks. - Feeling of heaviness in the affected leg, indicating possible weakness. - Pain felt between 30° and 70° of hip flexion, predominantly in the back, may indicate a herniated lumbar disc. - Pain and abnormal sensation in the leg can suggest compression of a peripheral nerve. - Pain reproduced above 70° of flexion or below 30° is generally musculoskeletal and not related to herniation. - Other signs specific to the affected nerve root, such as weakness or altered reflexes, can help with diagnosis: - L3 radiculopathy: Weakness of hip adduction, knee extension, and sensory pain in the front and inside of the thigh. - L4 radiculopathy: Ankle dorsiflexion weakness and an absent patellar reflex. - L5 radiculopathy: Hip abduction and big toe extension weakness. - S1 nerve root compression: Absent ankle reflexes.

The types of tests that may be needed to diagnose sciatica include: - X-rays or plain films of the lumbosacral spine to check for spinal fractures or spondylolisthesis - Non-contrast CT scan to further evaluate for fractures if X-rays are inconclusive - MRI (magnetic resonance imaging) to locate the source of pain and determine if surgery is necessary - MRI is also done right away if there are neurological symptoms or suspicion of something pressing on the nerves or spinal cord.

The other conditions that a doctor needs to rule out when diagnosing Sciatica include: - Herniation of a disc in the lower back (lumbosacral disc) - Muscle spasms - Impingement (pressure or squeezing) of the nerve root - An abscess (a collection of pus) in the epidural space around the spinal cord - A blood clot (hematoma) in the epidural space around the spinal cord - Tumors - Pott's disease, also known as spinal tuberculosis - Piriformis syndrome

The potential side effects when treating Sciatica include: - Increasing pain over time - Numbness or a prickling sensation in the affected leg - Loss of muscle strength in the affected leg - Loss of control over bowel or bladder - Lasting nerve damage

You should see a doctor specializing in orthopedics, neurology, or pain management for sciatica.

About 10% to 40% of people will experience it in their lifetime.

Sciatica can be treated through a combination of self-care recommendations and medical treatments. Self-care recommendations include using heat pads or ice packs, avoiding activities that worsen pain, maintaining good posture, doing exercises to strengthen core muscles, and gently stretching the lower back and thighs. Medical treatments may involve the short-term use of oral nonsteroidal anti-inflammatory drugs (NSAIDs), painkillers, muscle relaxants, anticonvulsants, oral steroids, local steroid injections, spinal manipulation, deep tissue massage, consulting with a physical therapist for additional exercises or treatments, and in some cases, surgery to correct structural issues in the back. Acupuncture can also be a useful treatment for sciatica.

Sciatica is a painful condition caused by pressure or damage to the sciatic nerve or an associated nerve in the lower back and spinal area. It refers specifically to pain that comes directly from issues with the sciatic nerve or its root nerves.

Join our newsletter

Stay up to date with the latest news and promotions!

"*" indicates required fields

This field is for validation purposes and should be left unchanged.

We care about your data in our privacy policy.