Pain that starts in your lower back and shoots down one leg has a name: sciatica. It follows the path of the sciatic nerve, the longest nerve in your body, which runs from your lower spine through each buttock and down the back of each leg. When something irritates or compresses the nerve roots that feed this nerve, the discomfort can travel far from its source. That’s why a problem in your spine can leave your calf or foot aching.
Sciatica is common, and for many people it improves with time and simple care. Still, the symptoms can range from a mild nuisance to sharp, limiting pain. Knowing what causes it, what to try first, and when to get help puts you back in control. If your symptoms are persistent or severe, a consultation with a spine and pain specialist can help you understand the source and your options.
This guide explains sciatica in plain language: what it feels like, what causes it, how it’s diagnosed, and the treatments that actually help.
What is sciatica?
Sciatica is nerve pain caused by irritation or compression of the nerve roots in your lower spine that form the sciatic nerve. It’s a symptom, not a diagnosis on its own. The pain typically radiates from the lower back or buttock down through one leg, following the nerve’s path.
The sciatic nerve is formed by nerve roots in the lumbar (lower back) and sacral (pelvic) spine. When a disc, bone, or nearby tissue presses on one of these roots, the nerve sends pain signals along its length. Most people feel sciatica on one side of the body at a time.
What does sciatica feel like?
Sciatica usually feels like a sharp, burning, or electric pain that travels from your lower back or buttock into your leg. Some people describe it as a deep ache, while others feel shooting jolts. The pain often worsens when you sit, cough, sneeze, or stand up after resting.
The sensation follows the nerve, so its exact location depends on which nerve root is affected. You might feel it in your buttock, the back of your thigh, your calf, or even your foot. Movement patterns matter too: many people find that walking eases the pain while prolonged sitting makes it worse.
What are the common symptoms of sciatica?
Sciatica symptoms center on radiating leg pain, but they often come with other nerve-related sensations. These signs typically appear on one side and can range from mild to intense depending on how much the nerve is irritated.
Common symptoms include:
- Radiating pain from the lower back or buttock into the leg
- Numbness in the leg or foot
- Tingling or a “pins and needles” feeling
- Muscle weakness in the affected leg
- Pain that worsens with sitting, coughing, or sudden movement
Not everyone experiences all of these. Some people have leg pain with no back pain at all, while others notice tingling more than pain. Track which movements trigger your symptoms — that information helps a clinician pinpoint the cause.
What causes sciatica?
Sciatica is most often caused by a herniated disc that presses on a nearby nerve root. Other causes include bone overgrowth, spinal narrowing, and muscle irritation near the nerve. In each case, the underlying problem is nerve compression or inflammation in the lower spine.
The most frequent causes are:
- Herniated disc — when the soft center of a spinal disc pushes out and presses on a nerve root.
- Bone spurs (bone overgrowth) — extra bone that narrows the space around the nerve.
- Spinal stenosis — narrowing of the spinal canal, more common with age.
- Piriformis syndrome — irritation from a buttock muscle that sits near the sciatic nerve.
Less often, injury, pregnancy, or a tumor can contribute. Identifying the specific cause guides the most effective sciatica treatment.
What are the risk factors for sciatica?
Several everyday factors raise your risk of developing sciatica. Most relate to how your spine ages, moves, and carries load over time. Understanding these helps you reduce your chances of a flare-up.
Key risk factors include:
- Age — disc and bone changes become more common after 30.
- Prolonged sitting — a sedentary routine strains the lower back.
- Occupations involving heavy lifting or twisting.
- Excess body weight, which increases pressure on the spine.
- Diabetes, which can affect nerve health.
- Smoking, which may weaken disc tissue over time.
You can’t change your age, but you can adjust posture, activity, and lifting habits. Start with the one factor most present in your daily routine.
How is sciatica diagnosed?
Sciatica is diagnosed through a physical exam and a review of your symptoms and medical history. A clinician checks your strength, reflexes, and sensation, and may perform a straight-leg raise test. Imaging is used only when symptoms are severe, persistent, or point to a specific cause.
During the exam, expect questions about where the pain travels and what makes it better or worse. If your provider needs more detail, they may order:
- MRI — to view discs, nerves, and soft tissue.
- X-ray — to check for bone spurs or alignment issues.
- CT scan — used in specific situations.
Most cases don’t need imaging right away. Bring a short list of your triggers and symptom timeline to your appointment.
How is sciatica treated?
Sciatica treatment usually begins with conservative care and progresses only if symptoms persist. The goal is to relieve nerve irritation, restore movement, and prevent recurrence. Most people improve without surgery, which is reserved for specific medical situations.
Treatment options, in a typical order:
- Self-care — apply heat or ice, and stay reasonably active rather than resting in bed.
- Physical therapy — targeted stretches and strengthening to relieve pressure on the nerve.
- Medications — over-the-counter or prescription options, when recommended by a healthcare professional.
- Injections — corticosteroid injections in selected cases to reduce inflammation around the nerve.
- Surgery — considered only when there’s significant weakness, nerve damage, or pain that doesn’t respond to other care.
Surgery is not necessary for most people. Discuss the risks and benefits of each step with your provider before deciding.
Can sciatica improve on its own?
Yes, sciatica often improves on its own within a few weeks with self-care and gentle activity. Many mild to moderate cases resolve as inflammation settles and the nerve is no longer irritated. Staying active, rather than resting completely, tends to support recovery.
Recovery time varies from person to person. If your pain is steadily easing, continuing gentle movement and good posture is reasonable. If it plateaus, worsens, or spreads, that’s your signal to seek an evaluation.
What exercises or physical therapy approaches may help?
Physical therapy for sciatica focuses on gentle stretches and strengthening that reduce pressure on the sciatic nerve. A tailored program improves flexibility, supports the spine, and lowers the chance of recurrence. Always start slowly and stop any movement that sharply increases leg pain.
Commonly recommended approaches include:
- Gentle hamstring and hip stretches to ease tension along the nerve path.
- Core strengthening to support the lower back.
- Low-impact aerobic activity such as walking.
- Posture and body-mechanics training for sitting and lifting.
A physical therapist can match exercises to your specific cause. Ask for a personalized plan rather than following generic routines.
When should you see a doctor for sciatica?
See a doctor if your sciatica lasts longer than a few weeks, keeps getting worse, or interferes with daily activities. You should also seek care if the pain follows an injury or if self-care hasn’t helped. A professional evaluation can identify the cause and guide treatment.
Early evaluation matters more when weakness, numbness, or pain is increasing. Don’t wait for symptoms to become disabling before booking an appointment.
What sciatica symptoms require urgent medical attention?
Certain symptoms require immediate medical care. Seek emergency evaluation if you experience sudden or severe leg weakness, loss of bowel or bladder control, or significant numbness in the groin or inner thighs. Symptoms that follow major trauma also need prompt attention. These can signal a serious condition affecting the nerves.
These red flags are uncommon, but they matter. If any occur, go to an emergency department rather than waiting for a routine visit.
How can sciatica be prevented or reduced from coming back?
You can lower your risk of sciatica by keeping your spine strong, mobile, and well-supported. Regular movement, good posture, and safe lifting habits protect the nerve roots in your lower back. These habits also help prevent recurrence after you recover.
Practical prevention steps:
- Stay active with regular low-impact exercise.
- Strengthen your core to support the spine.
- Lift with your legs, keeping your back straight.
- Adjust your workspace to reduce prolonged sitting.
- Maintain a healthy weight to lessen spinal pressure.
Pick one habit to build this week. Small, consistent changes protect your back over the long term.
Frequently Asked Questions About Sciatica
How long does sciatica usually last?
Many cases improve within a few weeks with self-care and gentle activity. Some last longer or recur. If your pain persists beyond six weeks or worsens, see a healthcare professional.
Is walking good for sciatica?
Yes, gentle walking often helps by keeping you active and reducing stiffness. Stop and rest if walking sharply increases your leg pain, and build distance gradually.
Should I rest or stay active with sciatica?
Stay reasonably active. Prolonged bed rest can slow recovery. Gentle movement supports healing, while extended inactivity tends to make symptoms worse.
Can sciatica affect both legs?
Sciatica usually affects one side at a time. Pain, numbness, or weakness in both legs can signal a more serious problem and should be evaluated promptly.
Does sciatica always require surgery?
No. Most people improve with conservative care. Surgery is reserved for significant weakness, nerve damage, or pain that doesn’t respond to other treatments.
What’s the difference between sciatica and general lower back pain?
Lower back pain stays in the back. Sciatica radiates from the back or buttock down the leg, following the sciatic nerve, and often includes numbness or tingling.
Can sitting too long cause sciatica?
Prolonged sitting can strain the lower back and worsen nerve irritation. Take regular breaks to stand and move, and check that your chair supports good posture.
Take the Next Step Toward Relief
Sciatica is often manageable, but you don’t have to navigate it alone. If your symptoms are persistent, severe, worsening, or accompanied by weakness or numbness, schedule an evaluation with a qualified spine and pain specialist. And if you notice any red-flag symptoms — such as sudden leg weakness or loss of bowel or bladder control — seek emergency care right away. A proper evaluation is the fastest path to understanding your condition and finding the treatment that fits your needs.
This article is for general educational purposes and is not a substitute for personalized medical advice. Consult a qualified healthcare professional for guidance specific to your situation.
