Last updated: June 27, 2026 | By Richard Hale
Sciatica is pain that radiates along the path of the sciatic nerve — from the lower back through the hip and buttock and down the leg, sometimes all the way to the foot. It is not a diagnosis in itself but a symptom of an underlying issue compressing or irritating the sciatic nerve. Understanding what is actually causing the pain determines which treatments work and which make it worse.
This content is for educational purposes only and is not medical advice. Seek immediate medical attention if you experience loss of bladder or bowel control, significant leg weakness, or saddle area numbness — these are emergency signs of cauda equina syndrome.
Table of Contents
- What Sciatica Actually Is
- Common Causes After 40
- Symptoms: How to Recognize It
- At-Home Approaches That Help
- What Makes It Worse
- When to Seek Professional Care
- Red Flags Requiring Immediate Attention
- Frequently Asked Questions
What Sciatica Actually Is
The sciatic nerve is the longest nerve in the body, formed by nerve roots from the lower lumbar spine (L4, L5) and sacrum (S1, S2, S3). It exits the spine, passes through the gluteal region (where it can be compressed by the piriformis muscle), and runs down the back of the thigh to branch below the knee into smaller nerves supplying the lower leg and foot.
Sciatic nerve irritation produces a distinctive pattern: the pain (or numbness, tingling, or burning) follows the nerve path rather than being localized to one spot. This is what distinguishes sciatica from general lower back pain. A person with sciatica can often draw a line down their leg following exactly where the discomfort runs — this nerve-following pattern is the defining feature.
Common Causes After 40
Herniated lumbar disc: the most common cause of sciatica in adults under 60. The intervertebral discs between the lumbar vertebrae are under significant compressive load over time. Disc herniation — where the inner gel-like nucleus pulposus pushes through the outer disc wall — can press directly on the nerve root exiting at that level. L4-L5 and L5-S1 are the most frequently affected levels, producing pain patterns down the leg that vary depending on which root is compressed.
Lumbar spinal stenosis: becomes increasingly common after 55-60. Stenosis refers to narrowing of the spinal canal (where the spinal cord and nerve roots travel) due to bone spur formation, thickened ligaments, and disc height loss — all degenerative changes that accumulate over decades. Sciatica from stenosis characteristically worsens with standing and walking and improves with sitting or leaning forward (because these positions open the spinal canal slightly). This pattern is called neurogenic claudication and distinguishes stenosis-related sciatica from disc herniation.
Piriformis syndrome: the piriformis muscle, located deep in the gluteal region, sits directly adjacent to the sciatic nerve. In some people, the nerve passes through the muscle. Tightness or spasm of the piriformis — often from prolonged sitting, hip muscle imbalance, or direct injury — can compress the nerve at this level. Piriformis syndrome produces buttock pain and sciatica-like symptoms without the spinal source, and responds to piriformis stretching and hip strengthening rather than spinal interventions.
Symptoms: How to Recognize It
Sciatica typically produces one or more of the following in the buttock, thigh, lower leg, or foot: sharp, shooting pain that worsens with certain positions; electric or burning sensations along the nerve path; numbness or tingling in a band or strip down the leg; or weakness in the affected leg (in more significant cases). It is usually one-sided.
Pain that is localized to the lower back without radiation, or that spreads across both sides of the lower back symmetrically, is more consistent with general lumbar muscle pain than nerve root compression. True sciatica almost always has a directional leg component.
At-Home Approaches That Help
Position of comfort: the most effective immediate intervention is finding positions that centralize or reduce the leg pain. For most disc-related sciatica, lying face down (prone lying) or walking reduces leg symptoms by loading the spine in extension. If walking relieves leg pain, this is a strong signal that McKenzie extension exercises (repeated prone press-ups) will be beneficial. If leg pain worsens in extension and improves in flexion (leaning forward, sitting), this pattern is more consistent with stenosis.
McKenzie extension exercises: for disc-related sciatica with the typical extension-relieving pattern, repeated lumbar extension reduces the disc herniation and centralizes pain (moves it from the foot toward the back, which is progress). The exercise is simple: lie face down, rest on forearms, then progress to pressing up onto hands while pelvis stays on the floor, holding 2-3 seconds and repeating 10 times. The key indicator that this is working is centralization — if leg symptoms move up toward the back with repetitions, continue.
Walking: short, regular walks (15-20 minutes) maintain circulation, reduce disc pressure through movement, and prevent the deconditioning that prolongs sciatica episodes. Prolonged sitting — particularly with poor posture — typically worsens disc-related sciatica and should be minimized during an acute episode.
NSAIDs: ibuprofen and naproxen reduce nerve inflammation and provide meaningful short-term pain relief for acute sciatica. Taken consistently (not just when pain peaks) for 5-7 days during an acute episode is more effective than as-needed dosing. Follow standard dosing guidelines and avoid if you have contraindications (kidney disease, peptic ulcer, cardiovascular risk).
Heat: applying heat to the lumbar region and gluteal area reduces muscle spasm that often accompanies sciatica. Do not apply ice directly to the nerve path — cold can temporarily worsen nerve symptoms in some people.
What Makes It Worse
For most disc-related sciatica: prolonged sitting, forward bending, coughing and sneezing (increases disc pressure acutely), and sitting with poor lumbar support. The sitting position maximizes disc pressure — nearly double the pressure of standing — which is why many people with active disc-related sciatica find standing and walking more comfortable than sitting.
For stenosis-related sciatica: prolonged standing and walking (both of which reduce spinal canal diameter slightly in extension). These patients are typically more comfortable sitting and leaning slightly forward.
When to Seek Professional Care
Physical therapy for sciatica is evidence-based and should be the first professional referral for most adults. A physiotherapist can assess which direction of movement relieves or centralizes symptoms (using the McKenzie method or similar approach), teach the relevant exercises, and address contributing factors like hip and core muscle weakness that load the lumbar spine.
If leg symptoms are severe, are not centralizing with directional exercises, or are affecting work and daily function significantly, imaging (MRI) can confirm the disc level involved and guide more targeted interventions. Imaging is not needed for typical sciatica in the first 4-6 weeks.
Epidural steroid injections provide meaningful short-to-medium term pain relief for disc-related sciatica and are appropriate when pain is severe and not responding to conservative care. They do not resolve the herniation itself but reduce the inflammatory component of nerve root irritation.
Red Flags Requiring Immediate Attention
Seek emergency care immediately if you experience: loss of bladder or bowel control; saddle area numbness (the inner thighs and perineum); significant weakness in both legs simultaneously; or rapidly progressing weakness in one leg. These symptoms suggest cauda equina syndrome — compression of the nerve roots at the base of the spinal cord — which requires surgical decompression within hours to prevent permanent neurological damage.
Frequently Asked Questions
How long does sciatica last?
Acute disc-related sciatica typically resolves within 6-12 weeks in most adults, with or without professional treatment. The prognosis is generally good — the majority of disc herniations resorb over time. Sciatica from spinal stenosis tends to be more chronic and recurring, requiring ongoing management strategies rather than a full resolution. Seeking appropriate care (physical therapy, directional exercises) accelerates recovery and reduces the risk of recurrence.
Is walking good or bad for sciatica?
Walking is generally beneficial for disc-related sciatica. It maintains spinal circulation, encourages the disc material to resorb, and prevents deconditioning. If walking relieves or centralizes leg symptoms (moves pain from foot toward back), it is strongly indicated. If walking significantly worsens leg pain, temporarily reducing duration and pace is appropriate, but maintaining some activity is preferable to complete rest. Stenosis-related sciatica is the exception — here, walking worsens symptoms and sitting provides relief.
What is the difference between sciatica and piriformis syndrome?
Both produce buttock and leg pain, but the source differs. Sciatica from spinal causes (disc, stenosis) produces symptoms that typically worsen with sitting and improve with walking or lying prone. Piriformis syndrome produces deep buttock pain that worsens with sitting (direct pressure on the piriformis), hip rotation activities, and can refer down the leg. A healthcare provider or physiotherapist can distinguish them through specific physical tests. Treatment differs significantly — piriformis syndrome responds to piriformis stretching and hip strengthening, not spinal extension exercises.
About the author: Richard Hale is an independent health writer focused on mobility, joint health, and active aging research. He is not a licensed medical professional. All content on VitalMove40 is for educational purposes only and is not a substitute for advice from a qualified healthcare provider.
