A pinched nerve happens when a nerve is compressed by surrounding tissue. It usually causes pain, pins and needles, numbness, and weakness. The nerve can be trapped in the spine, the arm, or the leg. So what does a pinched nerve feel like, and how do we treat it?
What causes a pinched nerve?
Nerves become pinched when they’re compressed by inflamed tissue or squeezed in a tight space. Inflammation around a nerve can follow trauma — an ankle sprain or a broken bone — or come from conditions that cause general inflammation and swelling, such as diabetes, thyroid problems, obesity, or pregnancy.
In the spine, a disc bulge can compress a nerve as it leaves the spine, causing radiculopathy. In the arms and legs, inflammation or a tight anatomical tunnel can trap a nerve — as in carpal tunnel syndrome, cubital tunnel syndrome, tarsal tunnel syndrome and meralgia paraesthetica.
What does a pinched nerve feel like? The four cardinal symptoms
A pinched nerve rarely causes just one symptom — usually several occur together, and the combination points to which nerve is affected. The four cardinal features are:
- Pain — often sharp, burning, or electric, and typically travelling along the path of the nerve rather than staying in one spot
- Pins and needles (tingling) in the area the nerve supplies
- Numbness or reduced sensation in the same area
- Weakness of the muscles supplied by the nerve — for example, a pinched nerve in the calf can cause weakness and tripping over the foot
The symptoms often “travel” — running down the arm or leg — which is a clue that the pain is coming from a nerve rather than a joint or muscle.
Warning signs: when a pinched nerve is an emergency
Seek urgent medical help if a pinched nerve in the lower back causes numbness around the back passage or genitals, difficulty passing or controlling urine, or loss of bowel control. Pressure on the nerves at the bottom of the spine can cause cauda equina syndrome — a rare but serious condition that needs emergency assessment to avoid permanent damage. Rapidly progressing or severe weakness in an arm or leg also needs prompt attention.
Most pinched nerves are not emergencies — but these particular warning signs are the exception, and they matter.
How is a pinched nerve diagnosed?
Your doctor examines you to work out whether the pinched nerve is coming from the spine, the arm, or the leg. They test your sensation, muscle strength, and reflexes, and pressing on the nerve at the site of compression often reproduces the pain and other symptoms.
Imaging then locates the cause. Ultrasound and MRI are both used — but ultrasound is increasingly valuable because it directly shows the nerve and detects signs of entrapment, such as swelling and thickening. A useful point: nerve entrapment often shows normal X-rays and MRIs — so a normal scan alongside ongoing nerve-type pain actually supports the diagnosis. Nerve conduction studies and a diagnostic injection help confirm it.
How is a pinched nerve treated?
Most pinched nerves settle without surgery. Treatment depends on the cause and the nerve involved, but usually follows a familiar order:
- Activity modification and physiotherapy — reducing the aggravating activity, and nerve-gliding and strengthening exercises
- Medication — nerve pain often responds to medicines such as amitriptyline or duloxetine, rather than ordinary painkillers
- Nerve hydrodissection — an ultrasound-guided injection that frees the nerve from the surrounding scar tissue and compression; a technique Dr Masci teaches across the UK and Europe
- Surgery — to release the nerve, reserved for cases that fail other treatment
Pinched nerves around the body
A pinched nerve can occur almost anywhere. Common examples include:
- Wrist — carpal tunnel syndrome (median nerve)
- Elbow — cubital tunnel syndrome (ulnar nerve)
- Outer thigh — meralgia paraesthetica
- Neck/arm — a cervical rib or thoracic outlet syndrome
- Calf and lower leg — a pinched nerve in the calf
- Inner knee/shin — saphenous nerve pain
- Groin and pelvis — groin nerve pain
- After an ankle sprain — nerve damage following an ankle sprain
- Ankle – tarsal tunnel syndrome
Frequently asked questions about a pinched nerve
What does a pinched nerve feel like?
Most often a mix of sharp, burning, or electric pain that travels along the nerve, together with pins and needles, numbness, and sometimes weakness in the area the nerve supplies. A brief version is the familiar “dead” feeling when a limb falls asleep — a true pinched nerve is similar but doesn’t clear quickly when you move.
How do I know if it’s a pinched nerve or a muscle problem?
Nerve pain tends to be sharp, burning, or electric and to travel along the limb, often with tingling or numbness — whereas muscle or joint pain usually stays local and feels more like an ache. Weakness, pins and needles, and numbness all point towards a nerve. An examination and, where needed, ultrasound confirm it.
When should I worry about a pinched nerve?
Most aren’t serious. But seek urgent help for numbness around the back passage or genitals, loss of bladder or bowel control, or rapidly worsening weakness — these can signal cauda equina syndrome or a significant nerve injury and need emergency assessment.
Will a pinched nerve heal on its own?
Many do, especially milder cases, with activity changes, physiotherapy, and time. More persistent entrapments may need medication, an ultrasound-guided hydrodissection, or — occasionally — surgery. The right treatment depends on which nerve is affected and why.
Why is my scan normal but I still have nerve pain?
That’s common with nerve entrapment — X-rays and even MRIs are often normal. A normal scan alongside genuine nerve-type symptoms actually supports the diagnosis. Ultrasound (which images the nerve directly), nerve conduction studies, and a diagnostic injection are more useful for confirming it.
Final word from Sport Doctor London about a pinched nerve
A pinched nerve causes a characteristic mix of pain, pins and needles, numbness, and weakness that travels along the nerve. Most settle with simple treatment, and ultrasound is an excellent tool for pinning down the cause — but a few warning signs, such as loss of bladder or bowel control, need urgent attention. Getting the diagnosis right is what allows the right treatment.
If you have persistent nerve-type pain, tingling, or numbness, Dr Masci can assess you in London, including ultrasound in clinic. Contact the team here or call +44 (0) 203 488 0350.
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