Sciatica can feel different from regular back pain. It may start in the lower back, move through the buttock, and travel down the leg. For some patients, it feels sharp and shooting. For others, it feels like burning, tingling, numbness, or weakness.
If you are searching for what causes sciatica, the main answer is nerve irritation. Sciatica usually happens when the sciatic nerve, or one of the nerve roots that forms it, becomes compressed or irritated.
At Gramercy Pain & Neuroscience Center in Beverly Hills, patients receive advanced care for spine, joint, and nerve conditions, with a focus on helping reduce pain, restore function, and improve quality of life. Gramercy is a destination for advanced care of spine, joint, and nerve conditions.
The Simple Answer: What Causes Sciatica?
Sciatica is usually caused by pressure or irritation affecting the sciatic nerve.
The sciatic nerve starts in the lower spine and travels through the buttocks and down the back of each leg. At Gramercy we explain that when this nerve is compressed, often because of a herniated disc, spinal stenosis, or spondylolisthesis, it can cause sharp, shooting pain that travels from the lower back through the buttock and down the leg.
Common causes may include:
Herniated disc
A herniated disc can press on a nearby nerve root in the lower back, causing pain that travels into the leg.
Spinal stenosis
Spinal stenosis means narrowing in the spinal canal. This narrowing may place pressure on nerves and cause sciatic-like pain.
Spondylolisthesis
This happens when one vertebra slips forward over another, which may irritate or compress nearby nerves.
Degenerative disc changes
As spinal discs change with age, they may lose height or flexibility, placing more stress on the spine and nearby nerves.
Bone spurs
Extra bone growth may narrow the spaces where nerves travel, leading to irritation or compression.
Piriformis muscle irritation
The piriformis muscle is located deep in the buttock. If it becomes tight or irritated, it may affect the sciatic nerve and cause symptoms similar to sciatica.
Injury or trauma
A fall, accident, sports injury, or sudden movement may irritate the lower back or sciatic nerve pathway.
Sciatica Is a Symptom, Not Just a Diagnosis
Many patients think sciatica is one specific condition. In reality, sciatica usually describes a group of symptoms caused by irritation of the sciatic nerve.
That means the real question is not only “Do I have sciatica?”
The more important question is: What is causing the sciatic nerve pain?
This matters because treatment depends on the source. Sciatica caused by a herniated disc may need a different approach than sciatica caused by spinal stenosis, muscle irritation, or sacroiliac joint dysfunction.
What Does Sciatica Feel Like?
Sciatica often affects only one side of the body and may cause pain that travels from the lower back into the buttock, leg, or foot. Some patients may also experience numbness, tingling, burning sensations, or muscle weakness in the affected leg.
Common symptoms may include:
- Lower back pain
- Buttock pain
- Pain that travels down the leg
- Burning or electric-like pain
- Tingling or numbness
- Muscle weakness
- Pain that worsens when sitting
- Pain that becomes worse with coughing, bending, or lifting
- Difficulty walking or standing for long periods
Some patients feel mild discomfort. Others feel severe pain that affects sleep, work, driving, and daily movement.
Why Does Sciatica Travel Down the Leg?
Sciatica travels down the leg because the sciatic nerve follows that pathway.
The sciatic nerve begins from nerve roots in the lower spine, then passes through the buttocks and continues down the back of the leg. When one part of this nerve pathway becomes irritated, pain may be felt in another area.
That is why a problem in the lower back may cause pain in the buttock, thigh, calf, or foot.
This is called radiating pain.
Daily Habits That May Trigger Sciatica
Some cases of sciatica begin from a spine condition, but daily habits can make symptoms worse.
Common triggers may include:
Sitting for long hours
Sitting for a long time can increase pressure on the lower back and may worsen nerve irritation.
Poor posture
Slouching or sitting without support can place extra strain on the lumbar spine.
Heavy lifting
Lifting with the back instead of the legs may increase pressure on the discs and nerves.
Repeated bending or twisting
These movements can irritate the lower back, especially if a disc or joint is already inflamed.
Weak core muscles
Weak support muscles may place more stress on the spine.
Sudden increase in activity
Starting intense exercise or physical work too quickly may trigger pain.
Driving for long periods
Long drives can combine sitting pressure with vibration and limited movement, which may aggravate sciatic pain.
When Sciatica May Be Related to the Sacroiliac Joint
Not all leg pain comes from a disc problem. In some cases, pain in the lower back, buttock, hip, or leg may be related to the sacroiliac joint, also known as the SI joint.
The SI joint connects the lower spine to the pelvis and plays an important role in stability and movement. When the joint becomes irritated or dysfunctional, it may cause chronic pain in the lower back, hips, buttocks, or legs and can affect mobility and everyday activities.
Because SI joint pain can sometimes feel similar to sciatica, a proper evaluation is important to identify the source of pain before choosing the most appropriate treatment approach.
When Should You See a Pain Specialist?
You should consider seeing a specialist if sciatic pain does not improve, keeps returning, or affects your ability to move normally.
You may need medical evaluation if you have:
- Pain lasting more than a few weeks
- Pain traveling below the knee
- Numbness or tingling in the leg or foot
- Muscle weakness
- Difficulty walking
- Pain that affects sleep or work
- Pain after an injury
- Symptoms that keep getting worse
Seek urgent medical care if you experience loss of bladder or bowel control, severe weakness, numbness in the groin area, or sudden serious neurological symptoms.
How Is Sciatica Diagnosed?
A diagnosis usually starts with understanding your symptoms and identifying where the nerve irritation may be coming from.
Your provider may review your medical history, pain pattern, work habits, previous injuries, and daily activities. During the physical exam, they may check movement, strength, reflexes, sensation, and whether certain positions reproduce the pain.
Imaging such as MRI, X-ray, or CT scan may be recommended in some cases, especially if symptoms are severe, long-lasting, or connected to weakness or nerve changes.
The goal is to find the true source of the pain, not only treat the symptom.
Treatment Options for Sciatica
Sciatica treatment depends on the cause, severity, and how much the pain affects daily life.
Conservative Care
Some patients may improve with rest, guided movement, physical therapy, posture correction, medication when appropriate, and activity changes.
The goal is to reduce irritation, support the lower back, and improve movement without putting more pressure on the nerve.
Targeted Spine Injections
When sciatic pain is caused by inflammation around a nerve, targeted injections may sometimes be considered as part of a personalized treatment plan. At Gramercy Pain & Neuroscience Center, treatment options may include epidural steroid injections, which are designed to deliver medication near the affected nerve area and may help reduce inflammation, relieve pain, and improve mobility for selected patients.
Nerve Blocks and Injections
Nerve blocks may help identify and treat pain coming from specific nerves and can sometimes be used when the exact source of pain needs to be confirmed. At Gramercy Pain & Neuroscience Center, nerve blocks and targeted injections are included among the available treatment options for patients experiencing spine, joint, or nerve-related pain.
Pulsed Radiofrequency Neuromodulation
For certain chronic nerve-related pain conditions, pulsed radiofrequency neuromodulation may be considered as a treatment option.
At Gramercy, we use pulsed radiofrequency neuromodulation to help manage chronic pain conditions such as back pain, neck pain, joint pain, trigeminal neuralgia, and sciatica.
Minimally Invasive and Regenerative Options
Depending on the diagnosis, some patients may be candidates for minimally invasive spine care or regenerative medicine.
At Gramercy, we offer a range of minimally invasive treatments designed to help accelerate recovery, improve mobility, and enhance quality of life.
Can Sciatica Go Away Without Surgery?
In many cases, sciatica may improve without surgery, especially when it is treated early and the cause is properly identified.
Non-surgical treatment may include physical therapy, medication management, targeted injections, nerve-focused treatments, and lifestyle changes.
However, surgery may be considered if there is severe nerve compression, progressive weakness, loss of bladder or bowel control, or symptoms that do not improve with appropriate non-surgical care.
The goal is not to avoid surgery in every case. The goal is to choose the safest and most effective treatment for the patient’s condition.
How to Reduce Sciatica Flare-Ups
You may be able to reduce flare-ups by lowering pressure on the lower back and improving spine support.
Helpful habits include:
- Avoid sitting for a long periods without breaks
- Use proper posture while working
- Lift with your legs, not your back
- Avoid twisting while carrying heavy objects
- Strengthen your core and hips
- Stay active with safe, guided movement
- Stretch carefully without forcing painful positions
- Maintain a healthy weight
- Follow your provider’s treatment plan
Small changes can help protect the spine and reduce repeated nerve irritation.
Sciatica Care in Beverly Hills, Los Angeles, Sherman Oaks, Encino, Brentwood, and Santa Monica
Patients in Beverly Hills, Los Angeles, Sherman Oaks, Encino, Brentwood, and Santa Monica often search for advanced care when sciatic pain starts affecting daily movement, work, sleep, or activity.
At Gramercy Pain & Neuroscience Center, we provide care for patients seeking advanced treatment for spine, joint, and nerve conditions.
If you are searching for what causes sciatica, the most important step is understanding what is irritating the sciatic nerve and choosing a treatment plan that fits your condition.
Final Thoughts
Sciatica is usually caused by irritation or compression of the sciatic nerve. Common causes include herniated discs, spinal stenosis, spondylolisthesis, degenerative disc changes, bone spurs, muscle irritation, or injury.
Because sciatica can come from different sources, the right diagnosis matters.
At Gramercy Pain & Neuroscience Center in Beverly Hills, patients receive personalized care focused on identifying the source of pain, reducing nerve irritation, improving mobility, and supporting a better quality of life.