Sciatica Symptoms: What That Leg Pain from Your Back Is Trying to Tell You

Quick Summary

• Sciatica is not a diagnosis on its own. It is a symptom of nerve compression in the lower back, most often from a herniated disc or spinal stenosis
• The hallmark pattern is pain, tingling, or numbness that travels from the lower back through the buttock and down one leg, sometimes reaching the foot
• Around 80% to 90% of sciatica cases resolve on their own within six to 12 weeks with appropriate nonsurgical care
• Bowel or bladder changes, progressive leg weakness, or bilateral symptoms are red flags that require immediate evaluation, not a wait-and-see approach

Spring yard work season is here and so is one of the most common complaints that brings patients into OCR’s spine and rehabilitation clinics: that sharp, burning, or electric pain that starts somewhere in the lower back and travels down into the leg. People describe it a dozen different ways. Some call it a pinched nerve. Others say their back went out. Many have already searched their symptoms online and arrived at one word: sciatica.

Understanding what sciatica actually is, what causes it, and what the symptom patterns mean is the first step toward getting the right care. This blog is focused entirely on that. If you are looking for a detailed breakdown of treatment options, our sciatica treatment overview covers that ground.

What Is Sciatica?

Sciatica is not a diagnosis in the traditional sense. It is a term that describes a set of symptoms caused by irritation or compression of the sciatic nerve, the largest nerve in the human body. The sciatic nerve originates from nerve roots L4 through S3 in the lumbar and sacral spine, runs through the buttock, and travels down the back of each leg to the foot. When something presses on or inflames one of those nerve roots, the result is the characteristic radiating pain most people associate with sciatica.

The lumbar spine absorbs the most mechanical stress from bending, lifting, prolonged sitting, and repetitive movements like gardening and yard work that pick up every spring in Colorado.

What Causes Sciatica?

Several underlying conditions can compress or irritate the sciatic nerve roots. The most common causes are:

• Herniated disc. The soft inner material of a spinal disc pushes through the outer layer and presses directly on a nearby nerve root. This is the most frequent cause of sciatica in people under 50 and often the source of the sharpest, most sudden-onset symptoms.
• Spinal stenosis. The spinal canal narrows, usually from age-related changes including bone spurs and thickened ligaments, reducing the space available for nerve roots. Stenosis-related sciatica tends to develop more gradually and is more common in adults over 50.
• Degenerative disc disease. As discs lose height and hydration over time, the vertebrae settle closer together and can pinch the nerve roots that exit between them.
• Spondylolisthesis. One vertebra slips forward over the one below it, narrowing the nerve exit channel and placing direct mechanical stress on the affected nerve root.
• Piriformis syndrome. Less common than spinal causes and typically considered a diagnosis of exclusion, this occurs when the piriformis muscle in the buttock compresses the sciatic nerve as it passes nearby. It is more likely to be provoked by activities that stress the hip and pelvis, including extended gardening postures and repetitive bending.

What Does Sciatica Feel Like?

The symptom pattern of sciatica is one of the more recognizable symptom patterns in musculoskeletal medicine, but it varies more than most people expect. Not everyone experiences the classic shooting leg pain. Understanding the full range of presentations helps you recognize whether what you are feeling fits the pattern.

The most common descriptions from patients include:

• Sharp, shooting, or electric pain that travels from the lower back or buttock down the back or side of one leg, sometimes reaching the calf or foot
• Burning or aching along the path of the nerve, particularly noticeable when sitting for extended periods
• Numbness or tingling in the leg, calf, or foot, sometimes described as the leg falling asleep without the normal circulation-related cause
• Weakness in the affected leg, foot, or toes, which may show up as difficulty lifting the foot, pushing off when walking, or holding a standing position on one leg
• Pain that worsens with sitting and often improves with walking or lying down, a pattern that reflects the increased disc pressure that prolonged sitting can create

Sciatica almost always affects one side at a time. Bilateral symptoms, meaning pain or numbness running down both legs simultaneously, are uncommon and warrant prompt evaluation, as they can indicate more significant spinal involvement.

Sciatica by Age: How Causes and Symptoms Shift

The cause of sciatica tends to shift depending on where someone is in life, and understanding that pattern helps set realistic expectations.

Adults in Their 30s and 40s

Herniated discs are the predominant cause in this age group. The discs are still hydrated enough to bulge under load but vulnerable to sudden pressure changes from lifting, twisting, or prolonged forward flexion. Onset is often sudden and associated with a specific activity or movement. Pain tends to be sharp and severe in the acute phase.

Adults in Their 50s and 60s

Spinal stenosis becomes a more common driver. Symptoms develop more gradually, often described as a slow worsening over months rather than a sudden event. Walking reliably provokes symptoms in stenosis-related sciatica, a pattern called neurogenic claudication, while sitting or bending forward tends to provide relief by opening the spinal canal slightly.

All Age Groups

Prolonged sedentary behavior, carrying excess body weight, and repetitive bending and lifting increase cumulative risk at any age. Spring yard work, which involves sustained forward bending, lifting awkward loads, and kneeling on uneven ground, consistently triggers flares in people who already have underlying disc or joint changes in the lumbar spine.

What Are the Red Flags?

Most sciatica is uncomfortable and disruptive but not dangerous. The nerve is being irritated or compressed, not permanently damaged, and in the majority of cases the body’s own healing processes resolve the problem over weeks to months. According to the American Academy of Physical Medicine and Rehabilitation, roughly 80% to 90% of patients with sciatica improve without surgery within six to 12 weeks.

Some symptoms indicate a more serious problem that requires prompt medical evaluation rather than a wait-and-see approach. Seek evaluation without delay if you experience any of the following:

• Bowel or bladder changes. Difficulty urinating, loss of bladder or bowel control, or a sudden inability to feel the urge to go can indicate cauda equina syndrome, a rare but serious compression of the nerve bundle at the base of the spine. This is a medical emergency.
• Progressive leg weakness. If weakness in your leg, foot, or toes is getting worse rather than staying stable, that progression suggests ongoing nerve damage rather than temporary irritation.
• Bilateral leg symptoms. Pain, numbness, or weakness running down both legs at the same time is uncommon and points to central spinal involvement that warrants evaluation.
• Saddle anesthesia. Numbness or loss of sensation in the inner thighs, genitals, or perineum is another indicator of cauda equina involvement.
• Symptoms following significant trauma. A fall, vehicle accident, or heavy impact that precedes sciatica symptoms warrants imaging to rule out fracture or structural instability before any other management.
• No improvement after six to eight weeks of initial treatment. At this point, a specialist evaluation can determine whether there is a structural cause that self-management is unlikely to resolve on its own.

When to See a Specialist vs. Wait and See

For most people with new-onset sciatica and none of the red flags listed above, a short period of relative rest followed by gradual return to movement is appropriate. Avoiding prolonged sitting, applying heat or ice as tolerated, and staying as active as pain allows typically produces improvement within the first two to four weeks.

A specialist evaluation makes sense when:

• Pain is severe enough to significantly limit daily function
• Symptoms have not improved after four to six weeks of self-management
• You are unsure whether what you are experiencing is sciatica or something else
• You want imaging or a specific diagnosis before committing to a course of care
• Any of the red flag symptoms above are present

An evaluation for suspected sciatica typically includes a physical exam testing reflexes, sensation, and strength in the affected leg, a review of symptom history and aggravating factors, and imaging if indicated. Magnetic resonance imaging (MRI) is the most useful study for identifying disc herniations and nerve compression. X-rays can reveal alignment, fracture, or significant degenerative changes but do not show soft tissue.

What Happens After a Diagnosis?

Once the cause of sciatica is identified, treatment options become more targeted. The large majority of cases are managed successfully without surgery through a combination of physical therapy, activity modification, and when appropriate, targeted injections to reduce nerve inflammation.

OCR’s spine team and physical medicine and rehabilitation physicians work within the same practice, which means your evaluation, imaging, and treatment plan are coordinated rather than fragmented across different systems. If nonoperative care is appropriate, that is where treatment begins. If structural involvement requires surgical consideration, that conversation happens with full context from the same team.

For cases that require more than nonoperative management, OCR’s fellowship-trained spine surgeons include Dr. Robert Benz, MD, Dr. William Biggs, MD, Dr. Patrik Suwak, DO, and Dr. Matthew Gerlach, MD. OCR’s PM&R and pain management physicians include Dr. Eben Alexander, DO, Dr. Ray van den Hoven, MD, and Dr. Colton Malesovas, MD.

Get a Clear Answer on What Is Causing Your Leg Pain

Leg pain that starts in the back and travels down deserves a real explanation, not a guess. If your symptoms have lasted more than a few weeks, are worsening, or include any of the red flags described above, an evaluation with OCR’s spine or PM&R team can give you a diagnosis and a plan. Request an appointment at any OCR location across northern Colorado.