Sciatica Symptoms: What Does Sciatic Nerve Pain Feel Like?

What Is Sciatica?

Sciatica describes symptoms caused by irritation or compression of a nerve root in the lower spine.

These nerve roots contribute to the nerves supplying the legs. When one is affected, symptoms can travel away from the spine and into the buttock, thigh, lower leg or foot.

Sciatica is therefore not simply another term for lower back pain. It is a pattern of nerve-related symptoms affecting the leg.

Read more: What Causes Sciatica?

What Does Sciatica Pain Feel Like?

Sciatic nerve pain can vary considerably between individuals.

Patients may describe the pain as:

• sharp
• shooting
• burning
• electric or shock-like
• aching
• stabbing

The pain often follows a line down the leg rather than remaining confined to one small area.

Some people experience intermittent pain, while others have more continuous symptoms.

Where Is Sciatica Pain Usually Felt?

Sciatica commonly affects the buttock and one leg.

Depending upon which nerve root is involved, symptoms may extend into different areas, including:

• the buttock
• the back or side of the thigh
• the front or side of the lower leg
• the calf
• the ankle
• the foot
• the toes

The distribution of pain is one of the features a clinician considers when trying to identify which nerve may be affected.

Does Sciatica Always Start in the Back?

No.

Although the irritated nerve originates in the lower spine, some patients experience relatively little lower back pain.

The most prominent symptom may instead be pain in the buttock, thigh, calf or foot.

This is why significant leg pain can still be caused by a spinal nerve problem even when the back itself is not particularly painful.

Can Sciatica Cause Tingling or Pins and Needles?

Yes.

Because sciatica involves a nerve, symptoms are not limited to pain. Irritation or compression of a spinal nerve can alter sensation and cause:

• pins and needles
• tingling
• burning sensations
• areas of reduced or altered sensation

These symptoms may occur in the same general distribution as the pain.

Can Sciatica Cause Numbness?

Yes. Numbness or reduced sensation can occur when a spinal nerve is compressed.

The location of numbness can help identify the nerve involved. For example, altered sensation may affect part of the calf, foot or particular toes.

Numbness does not necessarily indicate permanent nerve damage, but persistent, worsening or extensive sensory loss should be medically assessed.

Can Sciatica Cause Weakness?

Yes. A spinal nerve carries signals involved in both sensation and muscle movement.

If nerve compression significantly affects motor function, a person may notice weakness in part of the leg or foot.

Examples can include difficulty with particular movements or, in more significant cases, difficulty lifting part of the foot.

New, significant or progressively worsening weakness should be medically assessed promptly.

Can Sciatica Affect the Foot and Toes?

Yes.

Sciatic symptoms can extend as far as the foot and toes because the nerves originating in the lower spine supply these areas.

Depending upon which nerve root is affected, a patient may experience:

• pain extending into the foot
• tingling in particular toes
• numbness
• weakness affecting movement of the foot or toes

The precise distribution varies between patients.

Can Sciatica Affect the Calf?

Yes. Pain or altered sensation in the calf is common in some patterns of sciatica.

However, calf pain can also have non-spinal causes, including muscular problems and circulatory conditions.

Leg pain should therefore not automatically be assumed to be sciatica, particularly if the symptoms do not follow a typical nerve-related pattern or there are other concerning features.

Does Sciatica Usually Affect One Leg or Both Legs?

Typical sciatica often predominantly affects one leg because one nerve root is being irritated or compressed.

However, symptoms can affect both legs in some spinal conditions, particularly where there is more central narrowing involving multiple nerves.

Sciatic symptoms affecting both legs together with severe or worsening weakness or numbness, bladder or bowel disturbance, or altered sensation around the genitals or anus require urgent medical assessment.

Can Sciatica Symptoms Come and Go?

Yes.

Sciatica may fluctuate over time. Some patients experience periods when symptoms are relatively mild followed by episodes of more significant pain.

Symptoms can also change as the underlying nerve irritation settles or as activities and positions alter the mechanical pressure around the affected nerve.

A fluctuating pattern does not by itself determine how serious the underlying condition is.

Can Sciatica Come on Suddenly?

Yes. Symptoms can begin suddenly, particularly in association with a lumbar disc prolapse.

Some patients notice pain after lifting, bending or twisting, while others cannot identify any specific event.

In other cases, sciatica develops more gradually, particularly when nerve compression is associated with age-related narrowing such as lumbar spinal stenosis.

Can Coughing or Sneezing Make Sciatica Worse?

It can.

Some people with nerve root irritation find that coughing, sneezing or certain movements temporarily increase their leg pain.

This can occur because these actions change pressure around the spine and affected nerve.

However, this symptom alone cannot establish the diagnosis or cause of sciatica.

Can Sitting Make Sciatica Worse?

Yes, in some patients.

Particular positions can increase symptoms depending upon the underlying cause of the nerve irritation.

For example, some people with a lumbar disc problem find prolonged sitting uncomfortable.

Other patients, particularly those with lumbar spinal stenosis, may find that sitting actually improves their leg symptoms.

The relationship between posture and symptoms can therefore provide useful information during clinical assessment.

Can Walking Make Sciatica Worse?

It depends upon the underlying condition.

Some patients with sciatica caused by a disc prolapse can walk reasonably well, while others find that particular movements aggravate symptoms.

People with lumbar spinal stenosis may experience pain, heaviness, numbness or weakness in the legs during standing or walking, with improvement when sitting or bending forwards.

This pattern is known as neurogenic claudication.

Read more: Spinal Stenosis and Leg Pain.

How Can I Tell the Difference Between Sciatica and Ordinary Back Pain?

Ordinary lower back pain is usually felt predominantly in the lower back itself and may sometimes spread into the buttocks or upper thighs.

Sciatica is more specifically associated with nerve-related symptoms extending into the leg.

Features that can suggest sciatica include:

• pain travelling below the buttock into the leg
• sharp, burning or shooting pain
• tingling or pins and needles
• numbness
• weakness

However, not all leg pain is sciatica and a clinical assessment may be required to establish the likely cause.

Is Every Pain Down the Leg Sciatica?

No.

Several conditions can cause pain in the buttock, thigh, calf or foot.

Other possible sources of leg pain include:

• hip problems
• muscular or tendon injuries
• peripheral nerve problems
• joint conditions
• circulatory problems
• other medical conditions

The location of pain alone is therefore not enough to diagnose sciatica.

How Are Sciatica Symptoms Assessed?

Assessment begins with understanding the pattern of symptoms.

A clinician may ask:

• where the pain starts
• where it travels
• whether one or both legs are affected
• whether there is numbness or tingling
• whether there is weakness
• what activities worsen or relieve the symptoms
• whether coughing or sneezing affects the pain
• how symptoms affect walking, sleep and normal activities
• how long the symptoms have been present

A neurological examination may assess muscle strength, sensation and reflexes.

This can help determine whether the symptoms are consistent with irritation or compression of a spinal nerve.

Do Sciatica Symptoms Always Require an MRI?

No.

Many episodes of sciatica improve without an MRI scan or surgery.

Imaging may become appropriate when symptoms remain significant, neurological deficits are present, the diagnosis is uncertain or the results are likely to influence further treatment.

An MRI can help identify whether a disc prolapse, spinal stenosis or another structural abnormality corresponds with the pattern of symptoms.

Read more: MRI Scans for Sciatica: When Are They Needed?.

How Long Can Sciatica Symptoms Last?

The duration varies considerably.

Many episodes improve over a period of weeks to a few months, although symptoms can persist for longer in some people.

The duration alone does not determine whether surgery is required. The severity of symptoms, neurological findings, functional limitation and underlying cause all need to be considered.

When Should I Seek Medical Advice for Sciatica?

Medical assessment may be appropriate when:

• symptoms are severe
• pain is not improving
• symptoms significantly affect normal activities
• there is persistent numbness or tingling
• weakness develops
• the diagnosis is uncertain
• symptoms repeatedly return

Significant or progressively worsening neurological symptoms warrant earlier assessment.

When Do Sciatica Symptoms Require Urgent Medical Attention?

Most sciatica is not a medical emergency. However, certain symptoms require urgent assessment.

Seek urgent or emergency medical help if sciatica is associated with:

• severe or worsening weakness or numbness affecting both legs
• loss of sensation around the genitals, anus or inner thighs
• new difficulty starting or controlling urination
• inability to urinate
• new loss of bowel control

These symptoms can indicate significant compression of the nerves at the bottom of the spinal canal, including cauda equina syndrome, and require urgent medical assessment.

Frequently Asked Questions About Sciatica Symptoms

What are the main symptoms of sciatica?

Sciatica commonly causes pain extending from the buttock into one leg. The pain may feel sharp, shooting or burning and can be accompanied by tingling, numbness or weakness.

Where does sciatica pain start and end?

The pattern varies. Pain may start in the lower back or buttock and extend through the thigh and lower leg, sometimes reaching the foot or toes.

Can you have sciatica without back pain?

Yes. Some people have significant leg pain with little or no lower back pain. The nerve irritation still originates from the lower spine.

Can sciatica cause numb toes?

Yes. Nerve compression can cause altered sensation or numbness in parts of the foot or particular toes, depending upon which nerve root is affected.

Can sciatica cause leg weakness?

Yes. Significant nerve compression can affect the muscles controlled by that nerve. New or worsening weakness should be medically assessed.

Does sciatica always affect one leg?

It usually predominantly affects one leg, but both legs can be affected in some spinal conditions. Bilateral symptoms associated with severe neurological changes, bladder or bowel disturbance or saddle-area numbness require urgent assessment.

How do I know if leg pain is sciatica?

Sciatica typically involves pain travelling along the leg with possible tingling, numbness or weakness. However, several non-spinal conditions can also cause leg pain, so assessment may be required when the cause is uncertain.

About This Article

This article provides general information about the symptoms of sciatica and nerve-related leg pain. It is not intended to diagnose an individual's symptoms or replace personalised medical advice.

Medically reviewed by Professor Nasir A. Quraishi
Consultant Spinal Surgeon & Honorary Professor

Clinical sources: NICE guidance on low back pain and sciatica in people aged 16 and over, NICE guidance on suspected neurological conditions, and NHS guidance on sciatica.

Further Information About Sciatica

If leg pain, numbness, tingling or weakness may be related to irritation or compression of a spinal nerve, specialist assessment can help establish the cause and whether further investigation or treatment may be appropriate.

Learn more about Leg Pain / Sciatica

What Causes Sciatica?
MRI Scans for Sciatica: When Are They Needed?
Sciatica from a Slipped Disc
Spinal Stenosis and Leg Pain
When Does Sciatica Need Surgery?