Yes, sciatica is nerve pain. Specifically, it’s pain caused by compression or irritation of the nerve roots that form the sciatic nerve, the longest nerve in your body. The medical term for this type of pain is radiculopathy, meaning it originates at a nerve root in the spine and radiates outward. About 40% of people in the U.S. experience some form of sciatica during their lifetime.
What Makes Sciatica Different From Other Pain
Most back pain comes from muscles, joints, or ligaments. Sciatica is different because the problem starts with a nerve. The sciatic nerve is formed by a bundle of nerve roots branching off the lower spine. When one of those roots gets compressed or irritated, usually at the L5 or S1 level (the lowest part of your lumbar spine), the pain doesn’t stay local. It travels along the path of the nerve itself, which runs from your lower back through your pelvis and buttock, down the back of your thigh, and into your lower leg.
This is why sciatica feels so distinct. Instead of the dull ache you’d expect from a pulled muscle, sciatica typically produces a sharp, shooting pain that follows a clear line down one leg. Many people describe it as a burning sensation or an electric shock. The pain often gets worse when you cough, sneeze, bend forward, or lift your legs while lying on your back. Along with the pain, you may notice numbness or a pins-and-needles tingling in parts of your leg or foot.
What Causes the Nerve Compression
The most common cause is a herniated disc. The rubbery cushions between your vertebrae can bulge or rupture, pushing into the space where the nerve root exits the spine. This is the culprit in the majority of sciatica cases. Bone spurs, which are bony overgrowths on the vertebrae, can also narrow that space and press on the nerve. Less commonly, a tumor or other structural problem puts pressure on the nerve roots.
The important detail is that the compression happens “upstream” from the sciatic nerve itself. The pinch occurs at the spine, but because the nerve carries signals all the way down your leg, you feel the pain far from where the actual problem is. This is why someone with sciatica might have intense calf pain even though nothing is wrong with their calf.
How Sciatica Typically Feels
Sciatica almost always affects one side of the body. The hallmark is pain that radiates from your lower back or buttock down the back or side of one leg. The intensity ranges widely. Some people have mild, intermittent tingling. Others experience pain severe enough to make standing or walking difficult.
The specific location of your symptoms depends on which nerve root is compressed. Compression at the L5 root often causes pain and weakness along the outer side of your lower leg and the top of your foot. Compression at S1 tends to affect the back of your calf and the sole of your foot. Numbness and tingling follow these same pathways, which is why your doctor can often pinpoint the affected nerve root based on where you feel symptoms.
How It’s Diagnosed
Diagnosis usually starts with a physical exam. One common test involves lying on your back while your doctor raises your straightened leg. If this reproduces your shooting leg pain, it suggests nerve root involvement. This test is quite sensitive, catching about 91% of cases in broader studies, but it’s not very specific. That means a positive result strongly suggests sciatica, but the test alone can’t confirm the exact cause.
If your symptoms are severe, persistent, or worsening, imaging (typically an MRI) can show whether a disc herniation, bone spur, or other structure is pressing on a nerve root. Imaging isn’t always necessary for milder cases, since most sciatica improves on its own within several weeks.
What Recovery Looks Like
Most people with sciatica improve significantly within 4 to 6 weeks without surgery. The body gradually reabsorbs or adapts to the disc material pressing on the nerve. During that time, staying gently active tends to produce better outcomes than strict bed rest. Walking, light stretching, and avoiding positions that worsen the pain are the practical foundations of recovery.
For pain that persists beyond a few weeks, physical therapy focused on core stability and nerve mobility can help. Steroid injections near the affected nerve root are another option for stubborn pain, reducing inflammation enough to break the cycle. Surgery becomes a consideration when pain remains severe after several months of conservative treatment, or when nerve compression is causing progressive weakness or numbness in the leg.
Red Flag Symptoms That Need Immediate Attention
In rare cases, severe nerve compression in the lower spine affects a bundle of nerves called the cauda equina. This is a medical emergency. The warning signs include sudden loss of bladder control or the inability to sense when your bladder is full, loss of bowel control, numbness in the groin or inner thigh area (sometimes called saddle numbness because it affects the region that would contact a saddle), and rapidly worsening weakness in one or both legs. Any combination of these symptoms alongside back or leg pain requires immediate evaluation by a spine specialist or emergency department. Without prompt treatment, the nerve damage can become permanent.