Sciatica can cause pain that travels from the lower back into the buttocks, hip, or leg. For some patients, the discomfort is accompanied by numbness, tingling, or weakness that can make walking, working, and everyday activities difficult. When conservative treatments do not provide enough relief, a lumbar epidural steroid injection may be considered.
Understanding how lumbar epidural steroid injections work, who may benefit, and what to expect can help patients make informed decisions about treatment for sciatica and other forms of nerve-related leg pain.
What is a lumbar epidural steroid injection?
A lumbar epidural steroid injection is a minimally invasive procedure that delivers medication into the epidural space around the nerves in the lower portion of the spine. The injection typically contains a corticosteroid designed to reduce inflammation, sometimes combined with a local anesthetic.
The goal of a lumbar epidural steroid injection is to decrease inflammation and irritation around spinal nerves that may be contributing to sciatica or radiating leg pain.
How can a lumbar epidural steroid injection help sciatica?
A lumbar epidural steroid injection can help sciatica by reducing inflammation around an irritated or compressed spinal nerve. Sciatica often develops when a nerve root in the lower back becomes irritated by conditions such as a herniated disc, degenerative disc changes, or spinal stenosis.
When inflammation around the nerve contributes to pain, delivering an anti-inflammatory medication near the affected area may reduce symptoms. Relief can make it easier for some patients to participate in physical therapy and return to normal activities.
What causes sciatica and leg pain?
Sciatica is usually caused by irritation or compression of one or more lumbar nerve roots. Common causes include herniated discs, bone spurs, degenerative disc disease, and lumbar spinal stenosis.
These conditions can narrow the space available for spinal nerves. Depending on which nerve is affected, symptoms may travel through the buttock and down the thigh, calf, or foot. Patients may experience sharp, burning, shooting, or electric-like pain, as well as numbness or tingling.
Who may be a candidate for a lumbar epidural steroid injection?
Patients with persistent nerve-related leg pain may be candidates for a lumbar epidural steroid injection when symptoms have not improved sufficiently with conservative care. Treatment may be considered when sciatica is associated with imaging findings and symptoms that suggest inflammation or irritation of a spinal nerve.
A physician typically considers the patient’s symptoms, medical history, physical examination, and diagnostic imaging before recommending an injection. A lumbar epidural steroid injection is not appropriate for every cause of back or leg pain.
What happens during the procedure?
During a lumbar epidural steroid injection, the patient is positioned so the physician can access the appropriate area of the lower spine. The skin is cleaned and numbed with a local anesthetic.
Using imaging guidance, such as fluoroscopy, the physician carefully advances a needle into the epidural space. Contrast dye may be used to confirm appropriate needle placement before the medication is delivered.
The procedure generally takes a relatively short amount of time, and patients are typically monitored briefly afterward before going home.
How quickly does a lumbar epidural steroid injection work?
The timing and degree of pain relief after a lumbar epidural steroid injection vary from patient to patient. The local anesthetic, when used, may provide temporary relief relatively quickly, while the corticosteroid may take several days to have its full anti-inflammatory effect.
Some patients experience significant improvement, while others may have partial or temporary relief. The response can also depend on the underlying cause of the nerve irritation.
How long does pain relief last after an epidural injection?
Pain relief after a lumbar epidural steroid injection can vary considerably. Some patients experience relief for weeks or months, while others experience shorter-lasting improvement or little benefit.
The purpose of the injection is not necessarily to permanently correct the structural cause of sciatica. Instead, reducing inflammation and pain may provide an opportunity for the underlying condition to be addressed through physical therapy, activity modification, or other treatments.
Are lumbar epidural steroid injections safe?
Lumbar epidural steroid injections are generally considered safe when performed by appropriately trained physicians using proper technique and imaging guidance. However, like any medical procedure, an injection carries potential risks.
Temporary soreness, increased pain, headache, bleeding, infection, or changes in blood sugar can occur. More serious complications are uncommon but possible. Patients should discuss their individual medical history, medications, and potential risks with their physician before treatment.
How many epidural steroid injections can a patient have?
The appropriate number and frequency of lumbar epidural steroid injections depend on the patient’s diagnosis, response to previous treatment, overall health, and the physician’s treatment plan.
Because corticosteroids can have systemic effects, injections are generally used as part of a broader treatment strategy rather than as an unlimited long-term solution. A physician can determine whether repeating an injection is appropriate based on symptom improvement and clinical circumstances.
What should patients do after a lumbar epidural steroid injection?
Patients are generally advised to follow their physician’s specific post-procedure instructions. Depending on the circumstances, normal activities may be resumed relatively quickly, while strenuous exercise or heavy lifting may be restricted temporarily.
If pain improves, physical therapy and appropriate exercise may help strengthen supporting muscles, improve mobility, and address contributing factors. Persistent or worsening symptoms should be discussed with the treating physician.
When should someone with sciatica seek medical attention?
Persistent or worsening sciatica deserves medical evaluation, particularly when leg pain interferes with walking, sleeping, work, or daily activities. New or progressive weakness should also be evaluated promptly.
Sudden loss of bladder or bowel control, significant numbness in the groin or saddle region, or severe or rapidly worsening weakness can indicate a medical emergency and requires immediate medical attention.
Can a lumbar epidural steroid injection eliminate sciatica permanently?
A lumbar epidural steroid injection may reduce inflammation and provide meaningful pain relief, but it does not necessarily eliminate the underlying cause of sciatica permanently. The long-term outlook depends on what is irritating the nerve and how that condition responds to treatment.
For appropriate patients, an injection can be one component of a comprehensive treatment plan designed to reduce pain, improve function, and support recovery. A medical evaluation can help determine whether a lumbar epidural steroid injection is appropriate for sciatica and leg pain.