Outer thigh numbness · Burning pain · Peripheral nerve ultrasound

Meralgia Paraesthetica: How a Peripheral Nerve Ultrasound Can Help

Why a compressed sensory nerve can cause numbness and burning at the same time, how the condition is diagnosed and what ultrasound can reveal.

Written by Mr Pedram Aghaei, Medical Writer · MSc Medical UltrasoundClinically reviewed by Mr Paul Watson, Lead MSK Consultant ClinicianPublished and last reviewed: 17 September 2026
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Peripheral nerve ultrasound assessment for meralgia paraesthetica and outer thigh symptoms

If you have ever had a patch of skin that feels numb and burning at the same time, it can seem impossible. Yet there is a straightforward reason for it.

When a sensory nerve is compressed, it stops carrying normal touch information properly, which the brain reads as numbness. It can also start firing abnormal signals, which the brain reads as burning, tingling or pins and needles.

Put these together and a patch of thigh can feel dead to the touch and hot at the same time.

When this happens on the outside of the upper thigh, the condition is called meralgia paraesthetica. It comes from one sensory nerve being trapped near the hip. This guide explains its causes, how ultrasound can help confirm it and what treatment involves.

What is meralgia paraesthetica?

Meralgia paraesthetica is compression of the lateral femoral cutaneous nerve, which supplies sensation to the skin over the outside of the thigh.

The nerve begins in the lower back, travels across the inside of the pelvis and reaches the thigh by passing close to the bony point at the front of the hip, which you can feel just below the waistband.

It is a purely sensory nerve. It carries feeling from the skin and does not control muscles, which is why meralgia paraesthetica does not cause muscle weakness. The leg can function normally while the skin sensation feels distinctly wrong.

What does meralgia paraesthetica feel like?

Common symptoms of meralgia paraesthetica affecting the front and outside of one thigh
The condition typically creates a clearly defined patch of altered sensation over the front and outside of one thigh.

Meralgia paraesthetica feels like a patch of altered sensation on the outside and front of one thigh, running from the hip towards the knee.

Numb or dead skin

Touch can feel muted, as though it is being felt through a layer of fabric.

Burning and tingling

Burning, pins and needles or tingling can occur in the same patch and may be worse at night.

Unusual sensitivity

Light contact from clothing or bedsheets can feel unpleasant even when deeper pressure feels like very little.

A clear one-sided patch

It usually affects one side and often has a border that can be mapped with a finger.

Worse with standing

Standing and walking often aggravate symptoms, while sitting may help by reducing tension across the front of the hip.

Symptoms below the knee, leg weakness or symptoms affecting both legs usually point to a different cause. Mention them to the clinician assessing you.

What causes meralgia paraesthetica?

Meralgia paraesthetica usually occurs because the nerve is compressed where it passes the front of the hip. The cause is often something being worn across that area.

The nerve is vulnerable because its route varies between people. It may pass under, through or above the ligament at the front of the pelvis, which helps explain why some people are more prone to compression.

The condition is more common in women, most often appears in the forties and fifties, and has a reported incidence of approximately three to four people per 10,000 each year.

Common causeHow it compresses or affects the nerve
Tight waistbands, belts and skinny jeansDirect pressure over the nerve at the front of the hip
Weight gainIncreased pressure around the groin and hip
PregnancyThe growing abdomen stretches and presses on the nerve
Seat belts and work beltsSustained pressure at the same point, which helps explain why the condition is seen in drivers and military personnel
Tool belts and body armourWeight is carried directly over the nerve
After surgeryHip replacement, spinal surgery and a bone graft taken from the pelvis can affect the nerve
Diabetes and thyroid problemsThese conditions can make nerves more vulnerable to compression generally

Swipe sideways to view the complete table.

Numbness or burning lasting more than a few weeks is worth confirming

A peripheral nerve ultrasound examines the lateral femoral cutaneous nerve where it crosses the hip and measures it against the normal range. Findings are explained during the appointment, with a written report to follow.

Nerve Ultrasound

How is meralgia paraesthetica diagnosed?

Diagnosis is based on the pattern of symptoms, physical tests and imaging when confirmation is needed.

Mapping the numb patch

The clinician checks whether the affected skin matches the territory supplied by the lateral femoral cutaneous nerve. This helps distinguish the condition from a back or hip problem.

Pelvic compression test

You lie on the unaffected side while the clinician presses down on the pelvis for about 45 seconds. This loosens the ligament over the nerve. Relief of symptoms is a positive result. Reported sensitivity is 95% and specificity is 93%.

Tinel’s sign

Tapping over the nerve near the front of the hip may send tingling into the thigh.

These tests can identify a likely nerve problem, but they do not show exactly where the nerve is compressed, how much it has swollen or whether another structure is pressing on it. Imaging provides those details.

Been told it may be coming from your back?

Sciatica, hip disorders and lateral femoral cutaneous nerve compression can all produce thigh symptoms, but their treatment pathways differ. Nerve imaging combined with a clinical assessment can help separate them.

Joint Pain Clinic

What does a peripheral nerve ultrasound show?

A peripheral nerve ultrasound shows the lateral femoral cutaneous nerve itself, which general tests cannot do.

The sonographer locates the nerve near the bony point at the front of the hip and measures its cross-sectional area, meaning the size of the nerve viewed end-on. A compressed nerve can swell just above the point where it is being squeezed, making this measurement clinically useful.

A 2021 study published in Quantitative Imaging in Medicine and Surgery compared 86 people with meralgia paraesthetica with healthy controls. The nerve measured 4.47 mm² on average in patients with the condition and 1.70 mm² in controls.

Using a cut-off of 2.65 mm², ultrasound identified the condition with 73.3% sensitivity and 91.2% specificity.

Confirms nerve involvement

The scan helps show whether the lateral femoral cutaneous nerve is involved rather than another structure.

Locates the compression

The sonographer follows the nerve to identify where along its course the problem sits.

Provides a measurement

The cross-sectional area can be recorded and compared later when assessing treatment response.

Confirm the nerve before treating it

A peripheral nerve ultrasound measures the nerve against published normal values, shows where compression occurs and can assess relevant structures around the hip during the same visit.

Nerve UltrasoundHip Ultrasound

Is meralgia paraesthetica dangerous?

Meralgia paraesthetica is not dangerous. The affected nerve carries sensation only, so it cannot cause muscle weakness and does not lead to permanent damage in the vast majority of cases.

It can, however, become genuinely uncomfortable and persistent, particularly when burning at night does not settle.

Arrange prompt medical assessment if symptoms affect both thighs, the leg becomes weak, bladder or bowel control changes, there is unexplained weight loss, or numbness is spreading. These signs point away from a straightforward trapped sensory nerve.

How is meralgia paraesthetica treated?

Conservative and image-guided treatment options for meralgia paraesthetica
Treatment usually begins by removing pressure and progresses to medication, an image-guided nerve block or specialist review when necessary.

Treatment usually follows a ladder, beginning with the simplest measures.

Take the pressure off

Removing the source of compression is the first and most effective step. This means loosening or changing waistbands, belts and tight trousers, adjusting the position of seat belts or work belts, and losing weight when this is a contributing factor.

Many people improve with these changes alone within a few weeks.

Medication

Simple pain relief and topical treatments help some people. When burning persists beyond a month or two, a GP may consider nerve-pain medication such as gabapentin. Our private GP clinic can assess this and arrange onward referral when needed.

Nerve block injection

An ultrasound-guided injection of local anaesthetic, sometimes combined with corticosteroid, can be placed precisely around the nerve.

This may settle symptoms for a useful period. If symptoms disappear when the nerve is numbed, the response also supports the diagnosis.

Surgery

Surgery is reserved for symptoms that have not settled after months of appropriate treatment. Options include releasing the nerve from the compressing tissue or dividing the nerve, which replaces burning with permanent numbness. A consultant orthopaedic assessment is the appropriate place to discuss these trade-offs.

Will meralgia paraesthetica ever go away?

Meralgia paraesthetica resolves on its own for most people. Around 85% of patients report spontaneous recovery with conservative management alone.

Recovery usually takes weeks to months, and numbness often lasts longer than burning. Many people find that the uncomfortable sensations settle first, leaving a mildly dulled patch that then fades gradually.

Book a nerve ultrasound with London Private Ultrasound

Thigh numbness can be unsettling because it may not feel urgent, yet it is easy to imagine a serious cause. Imaging the peripheral nerve can put a clear name to the problem.

The nerve is measured

We image the lateral femoral cutaneous nerve where it crosses the hip and compare its size with published normal values.

Nearby causes are assessed

Thigh symptoms can also arise from the hip, so relevant structures can be checked during the same visit when clinically appropriate.

Experienced sonographers and clinicians

The clinician who performs the scan interprets it, supported by a team combining orthopaedic surgery, MSK ultrasound and radiology.

Treatment in the same building

Guided nerve blocks, GP consultations and orthopaedic assessment are available through the Joint Pain Clinic team.

Convenient appointments

Same-day and next-day appointments are available seven days a week, 9am to 7pm, without a GP referral at 27 Welbeck Street in the Harley Street medical district and 54–56 Victoria Street in St Albans.

What you can book with us

Peripheral nerve ultrasound: A focused scan of the nerve causing the symptoms, measuring it against the normal range and identifying where it is being compressed.

Thigh ultrasound: If symptoms involve pain in the muscle rather than altered sensation in the skin, this scan assesses the soft tissues of the thigh.

Nerve UltrasoundThigh Ultrasound

Related musculoskeletal services

Peripheral nerve ultrasound

High-resolution assessment of a symptomatic peripheral nerve, including its course and cross-sectional area.

Nerve Ultrasound

Thigh ultrasound

Assessment of the muscles, tendons and other accessible soft tissues when pain is within the thigh itself.

Thigh Ultrasound

Hip ultrasound

Dynamic assessment of accessible hip structures when the symptoms may originate around the joint or outer hip.

Hip Ultrasound

Private GP clinic

Clinical assessment, medication advice and onward referral for persistent nerve pain or wider medical concerns.

Private GP Clinic

Ultrasound-guided injection

Precise image-guided treatment around the affected nerve when clinically appropriate.

Guided Injection

Orthopaedic assessment

Specialist review when symptoms persist despite conservative care or surgery needs consideration.

Orthopaedic Assessment

One-Stop Orthopaedic MSK Clinic

Coordinated specialist assessment, imaging and treatment planning in a single clinical pathway.

One-Stop MSK Clinic

Frequently asked questions

What doctor should I see for meralgia paraesthetica?

Most people begin with a GP, who can confirm the symptom pattern and advise on simple measures. If symptoms persist, an MSK clinician or consultant with access to nerve imaging is the next step. A nerve block or surgical opinion can be considered from there.

Will meralgia paraesthetica ever go away?

For most people, yes. Around 85% recover with conservative management, usually over weeks to months. Burning tends to settle before numbness.

Is meralgia paraesthetica dangerous?

No. The nerve carries sensation only, so it cannot cause muscle weakness and rarely causes lasting damage. Symptoms in both legs, weakness or bladder or bowel changes are different and require assessment.

What is the meralgia paraesthetica test?

The pelvic compression test is the main clinical test. You lie on the unaffected side while the clinician presses down on the pelvis for approximately 45 seconds, reducing tension on the nerve. Easing of symptoms is a positive result. Reported sensitivity is 95% and specificity is 93%.

How do you unpinch the nerve in meralgia paraesthetica?

Remove the source of compression by loosening waistbands and belts, adjusting the position of a seat belt and reducing pressure around the waist where applicable. If this is insufficient, an ultrasound-guided nerve block may help.

Which exercises help meralgia paraesthetica?

Gentle hip-flexor stretches, core and abdominal work, and avoiding prolonged standing may help. Adjust any activity or equipment that places sustained pressure across the front of the hip.

Can meralgia paraesthetica happen in pregnancy?

Yes. The growing abdomen can increase pressure on the nerve, and symptoms usually resolve after delivery when that pressure is removed.

Do I need a GP referral for a nerve ultrasound?

No. You can book directly. If you want the report sent to your GP, physiotherapist or consultant, tell the clinic on the day.

Medical disclaimer: This article provides general patient information and does not replace a medical consultation, examination or personalised advice. Seek prompt assessment for symptoms affecting both legs, weakness, bladder or bowel changes, unexplained weight loss or spreading numbness.
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Get clarity on persistent thigh numbness or burning

A high-resolution peripheral nerve ultrasound can measure the lateral femoral cutaneous nerve, identify where it is compressed and help guide the next stage of care.

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