Sciatica (Sciatic Nerve Pain)

Understanding sciatica — why it happens, what it feels like, and how it is treated in Lahore, Pakistan

What is Sciatica?

Sciatica describes pain that travels along the path of the sciatic nerve — from the lower back through the hips and buttocks and down each leg. The pain usually affects only one side of the body. It is not a diagnosis in itself but a symptom of an underlying problem, most often a herniated lumbar disc pressing on a nerve root.

The sciatic nerve is the longest and thickest nerve in the human body, roughly as wide as a thumb where it leaves the pelvis. When it — or the nerve roots that form it — is compressed or irritated, it produces the characteristic radiating pain from the lower back to the leg, often described as electric, burning, or shooting.

How Sciatica Feels — Patient Descriptions

"Like an electric shock running down my leg"

"Sharp burning from my back to my foot"

"My leg feels numb and heavy"

"Pain that gets worse when I sit"

"Tingling in my toes that won't go away"

"Worse in the morning when I stand up"

Why Does Sciatica Pain Go Down One Leg? — The Anatomy Explained Simply

The sciatic nerve is formed by five nerve roots that exit the spine in the lower back, at levels named L4, L5, S1, S2, and S3. These roots merge in the pelvis to form a single thick nerve that runs behind the hip, down the back of the thigh, and then splits at the knee to supply the lower leg and foot.

This is why a problem in the lower back — for example a disc bulging out at the L4-L5 or L5-S1 level — is felt not in the back itself, but as pain, numbness, or tingling running down the buttock, thigh, calf, and sometimes into the foot. The specific nerve root that is compressed determines exactly which part of the leg or foot is affected:

L4 nerve root

Front of thigh, inner shin, and knee; weakness straightening the knee

L5 nerve root

Outer shin and top of the foot, especially the big toe; weakness lifting the foot upward (foot drop)

S1 nerve root

Back of calf and sole/outer edge of foot; weakness pushing off on the toes, reduced ankle reflex

This pattern is why a careful clinical examination — checking which part of the leg is affected, along with reflexes and muscle strength — often tells an experienced neurosurgeon which spinal level is involved even before an MRI is done.

Causes of Sciatica — In Detail

Herniated Lumbar Disc

The most common cause, responsible for roughly 90% of cases. The soft inner core of a disc — usually at L4-L5 or L5-S1 — pushes through a tear in its outer wall and presses directly on the adjacent nerve root, causing both mechanical compression and chemical inflammation.

Spinal Stenosis

Age-related narrowing of the spinal canal or the small openings (foramina) where nerve roots exit, often from bone spurs and thickened ligaments. Typically causes pain that worsens with walking or standing and eases with sitting or leaning forward.

Piriformis Syndrome

The piriformis muscle deep in the buttock lies directly over the sciatic nerve. If it becomes tight, spasms, or is inflamed — common after prolonged sitting, an awkward fall, or overuse in athletes — it can irritate the nerve and mimic disc-related sciatica, even though the spine itself is normal.

Spondylolisthesis

One vertebra slips forward over the one below it, narrowing the space available for the nerve root as it exits the spine. Often develops gradually and may be associated with a congenital defect in the vertebra or degenerative wear.

Pregnancy-Related Sciatica

The growing uterus can place direct pressure on the lumbosacral nerve roots, and pregnancy hormones loosen ligaments around the pelvis and spine, changing posture and load distribution. This form of sciatica is usually managed conservatively and typically improves after delivery.

Spinal Tumors or Infection (Rare)

Occasionally, a growth or infection near the spine can compress the nerve roots. These are uncommon causes but are why persistent, unexplained, or worsening sciatica — especially with fever, weight loss, or night pain — always warrants proper imaging.

Sciatica vs Slip Disc — What's the Difference?

Patients often use "slip disc" (herniated disc) and "sciatica" interchangeably, but they are not the same thing. A slip disc is a structural problem — a disc bulging or rupturing out of its normal position. Sciatica is a symptom — leg pain caused when a slip disc (or another problem) presses on a nerve root.

In other words, a slip disc is one possible cause of sciatica, and it is the most common one, but not every slip disc causes sciatica (many are silent), and not every case of sciatica is caused by a slip disc — it can equally come from spinal stenosis, piriformis syndrome, or spondylolisthesis. For a deeper look at disc-related back and leg pain specifically, see our Herniated Disc condition page.

Sciatica vs Regular Back Pain — What's the Difference?

Feature	Sciatica	Regular Back Pain
Location	Down one leg to foot	Mostly in the back
Nature	Electric, burning, shooting	Dull ache or muscle soreness
Leg symptoms	Numbness, tingling, weakness	Usually absent
Worse with	Sitting, coughing, sneezing	Movement, lifting
Cause	Nerve root compression	Muscle strain, disc degeneration

Self-Assessment — Is It Really Sciatica, or Something Else?

Not all leg pain is sciatica. Several other conditions can mimic it, and telling them apart matters because the treatment is different. This is not a substitute for a proper examination, but these pointers can help you describe your symptoms more accurately to a doctor.

True Sciatica (nerve root compression): Pain follows a clear line from the lower back or buttock down the back/side of the leg, often below the knee to the foot. Usually one-sided, and worse with sitting, coughing, or bending forward.

Piriformis Syndrome: Pain is centered in the buttock itself, often worsened by sitting on hard surfaces or climbing stairs, and does not usually reach as far down the leg as true sciatica. Back movements (bending, twisting the spine) do not typically trigger it, since the spine itself is not the problem.

Hip Arthritis: Pain is felt more in the groin or side of the hip and thigh, and is worsened by hip movement (walking, standing up from a chair, putting on shoes) rather than by back positions. Rarely radiates below the knee.

Diabetic Peripheral Neuropathy: Very common in Pakistan given high rates of diabetes. Causes numbness, tingling, or burning that is usually symmetrical — affecting both feet/legs in a "stocking" pattern — rather than shooting down one leg from the back. Longstanding, poorly controlled blood sugar is the key clue, and nerve conduction studies can help confirm it.

If you are unsure which of these applies to you, a clinical examination and, where needed, an MRI or nerve conduction study will confirm the cause.

Red-Flag Symptoms — When Sciatica Is an Emergency (Cauda Equina Syndrome)

Cauda equina syndrome occurs when the bundle of nerve roots at the bottom of the spinal cord is severely compressed — most often by a large central disc herniation. It is a genuine surgical emergency. If you notice any of the following, go to the emergency department immediately — do not wait for a scheduled appointment:

!New difficulty controlling your bladder — retention or incontinence

!Loss of control over bowel movements

!Numbness in the saddle area — inner thighs, buttocks, and around the genitals ("saddle anaesthesia")

!Weakness or numbness affecting both legs, not just one

!Severe, rapidly worsening leg weakness

!Sudden loss of sexual sensation or function

Cauda equina syndrome requires emergency MRI and, if confirmed, surgical decompression usually within 24-48 hours to give the best chance of preventing permanent bladder, bowel, or leg function loss. Every hour of delay reduces the chance of full recovery.

How Long Does Sciatica Last Without Treatment?

For most patients, sciatica caused by a disc herniation is a self-limiting problem. Widely cited medical literature indicates that around 90% of cases resolve — with or without formal treatment — within 6 to 12 weeks, as the inflammation around the nerve root settles and the herniated disc fragment gradually shrinks and is reabsorbed by the body.

That said, "without treatment" does not mean without any care at all — appropriate activity modification, avoiding prolonged bed rest, and basic pain control generally speed recovery and reduce the risk of the pain becoming chronic. Left completely unmanaged, severe cases can lead to worsening weakness or numbness, which is why it's worth tracking your symptoms rather than simply waiting it out indefinitely.

When Does Sciatica Need Surgery vs Physiotherapy?

The large majority of sciatica patients never need surgery. Physiotherapy, activity modification, anti-inflammatory medication, and — where needed — epidural steroid injections form the first line of treatment and are appropriate for the first 6-8 weeks in almost every case without red-flag symptoms.

Physiotherapy / Conservative Care Is Appropriate When:

› Pain is present less than 6-8 weeks
› No significant or progressive leg weakness
› No red-flag (cauda equina) symptoms
› Pain is manageable with medication and activity modification
› MRI (if done) shows a mild-to-moderate disc bulge

Surgery Should Be Considered When:

› Severe pain persists beyond 6-8 weeks despite proper conservative treatment
› Progressive weakness, e.g. foot drop
› MRI confirms a significant disc herniation or stenosis matching the symptoms
› Cauda equina symptoms are present (surgical emergency, not elective)
› Quality of life is severely affected and conservative options are exhausted

Dr. Waqas Mehdi follows a conservative-first approach — surgery such as microdiscectomy or endoscopic discectomy is recommended only when it is genuinely needed, and is discussed in full detail on the Sciatica Treatment page.

Frequently Asked Questions

Can sciatica go away on its own?

Yes. In roughly 90% of cases, sciatica caused by a disc herniation improves on its own or with simple conservative measures — rest from aggravating activity, anti-inflammatory medication, and gentle movement — within 6 to 12 weeks. The nerve root inflammation settles and the small disc fragment often shrinks over time. Cases that persist beyond 8-12 weeks despite proper treatment, or that involve worsening weakness, are the ones that usually need further intervention.

What is the fastest way to relieve sciatica pain?

In the acute phase, short-term rest (1-2 days, not prolonged bed rest), anti-inflammatory medication, and nerve-pain medication can bring quick relief. An epidural steroid injection often gives the fastest significant relief for pain that hasn't responded to tablets, sometimes within days. If pain is severe and disabling with a clear disc herniation on MRI, microdiscectomy provides fast, often immediate relief of leg pain.

Is walking good or bad for sciatica?

Gentle walking is usually good for sciatica and is generally encouraged over strict bed rest, which can stiffen the back and slow recovery. Short, frequent walks help maintain blood flow and mobility. However, if walking sharply worsens the shooting leg pain, or triggers new numbness or weakness, stop and get it assessed — this can be a sign the nerve is under more significant pressure.

Can sciatica cause permanent nerve damage?

In most cases, no — the nerve recovers fully once the compression is relieved. However, if a severely compressed nerve root is left untreated for a prolonged period, or if cauda equina syndrome occurs and is not treated as a surgical emergency within hours, permanent weakness, numbness, or bladder/bowel dysfunction can result. This is why red-flag symptoms need urgent same-day evaluation.

What sleeping position is best for sciatica?

Sleeping on your back with a pillow under the knees, or on your side with a pillow between the knees, keeps the spine in a more neutral position and reduces pressure on the sciatic nerve roots. Sleeping on your stomach is usually the worst position, as it arches the lower back and can increase nerve irritation.

How do I know if my sciatica needs surgery?

Surgery is typically considered if pain persists beyond 6-8 weeks despite proper conservative treatment, if there is progressive leg weakness (such as foot drop), or if there are signs of cauda equina syndrome — loss of bladder or bowel control, which is a surgical emergency requiring same-day treatment.

Who is the best doctor for sciatica treatment in Lahore?

Dr. Waqas Mehdi, FCPS Neurosurgeon and Assistant Professor at KEMU and Mayo Hospital, Lahore, is widely recognized as one of the best neurosurgeons in Lahore for sciatica and herniated disc treatment, offering both conservative care and minimally invasive spine surgery.

Is sciatica surgery in Lahore safe?

Modern minimally invasive techniques — including microdiscectomy and endoscopic discectomy — have made sciatica surgery very safe, with small incisions, short hospital stays (often 1-2 days), and faster recovery compared to traditional open surgery.

Suffering from Leg Pain? Get Expert Diagnosis in Lahore

Dr. Waqas Mehdi specializes in sciatica diagnosis and treatment — from conservative care to minimally invasive disc surgery.

Call 0300-8482624 Sciatica Treatment →

Related Conditions & Services

Herniated Disc Spinal Stenosis Sciatica Treatment Spine Surgery Back Pain Red Flags About Dr. Waqas Mehdi

Consult Dr. Waqas Mehdi Today

Pakistan's trusted neurosurgeon for brain tumor surgery, spine surgery, and all complex neurological conditions. Book your appointment at MidCity Hospital, Lahore.

Call: 0300-8482624 Book Appointment Online