I have pins and needles in my leg that won't go away - what's causing it?

Pins and needles that linger for more than a few minutes are worth paying attention to. The occasional tingle after sitting awkwardly resolves in seconds - your leg "wakes up" and you move on. But when that sensation keeps coming back, sticks around, or starts spreading, something more is going on. Here's what might be behind it.

Why do we get pins and needles at all?

The sensation itself - that buzzing, prickling, sometimes burning feeling - is a nerve signal. Specifically, it's what happens when a nerve is compressed, irritated, or not receiving adequate blood supply. The nerve is essentially misfiring, sending signals that your brain interprets as tingling rather than normal sensation.

The tricky part is that nerves in your leg can be affected at multiple points along their path, from your lower back all the way down to your foot. That's why the location and pattern of your pins and needles is one of the most useful clues in figuring out what's going on.

Common causes: working from the spine down

Lower back and spinal nerve compression

One of the most common causes of persistent pins and needles in the leg is nerve compression in the lumbar spine. The nerves that supply your legs exit the spinal cord through small gaps between the vertebrae. When those gaps narrow, due to a disc bulge, disc herniation, or arthritic changes, those nerves can become irritated.

Sciatica is probably the most well-known version of this. The sciatic nerve runs from your lower back through the buttock and all the way down the back of your leg to your foot. When it's compressed or irritated, people often describe a deep aching or burning that travels down the leg, sometimes with pins and needles, numbness, or weakness alongside it.

What makes it confusing is that the pain and tingling often isn't felt at the source. You might have no back pain at all and only notice symptoms in your calf or foot.

Piriformis syndrome

The sciatic nerve passes through or near the piriformis muscle in the buttock. If this muscle becomes tight or inflamed — common in runners, cyclists, and people who sit for long stretches — it can compress the nerve and produce symptoms similar to spinal sciatica. People often describe it as a deep ache in the buttock that gets worse sitting down or climbing stairs.

Peripheral nerve entrapment

Further down the leg, nerves can also become compressed at specific points, the knee, ankle, or foot. Tarsal tunnel syndrome (compression of the tibial nerve at the ankle) and common peroneal nerve entrapment at the outer knee are two examples. These tend to produce tingling in more localised areas rather than travelling up the whole leg.

Vascular causes

Less commonly, reduced blood flow to the leg can cause tingling. Peripheral artery disease can produce symptoms during exercise that ease with rest. This requires a different kind of assessment and is worth mentioning because it sits outside the musculoskeletal picture.

Systemic causes

Persistent tingling in both legs at the same time, or tingling that spreads into other parts of the body, can sometimes point to systemic conditions — diabetes-related neuropathy, vitamin B12 deficiency, or neurological conditions among them. These aren't musculoskeletal issues and would need investigation with your GP. This is a priority to seek medical advice if you have these symptoms.

When does it need urgent attention?

Most cases of pins and needles in the leg aren't emergencies, but some are. See a doctor or go to the emergency department of a hostpiral if you notice any of the following:

• Sudden onset of tingling or weakness in both legs at the same time

• Loss of bladder or bowel control alongside leg symptoms

• Symptoms that developed after a fall or accident

• Rapid progression of leg weakness — trouble walking or lifting your foot

• Tingling that spreads into your torso or arms

These can indicate spinal cord involvement or other serious neurological conditions that need immediate assessment.

What should I do if it's been going on for a while?

If you don't have any of the red flags above but the tingling keeps coming back, the most useful step is working out where along the nerve's path the problem is sitting.

A physiotherapy or osteopathy assessment can help with this. A physio or osteo will assess your movement, test reflexes and sensation, and use specific clinical tests to identify whether the issue is coming from the lumbar spine, the hip region, or somewhere further down. From there, management might include manual therapy, neural mobilisation exercises, or a structured rehabilitation program.

Where longer-standing nerve irritation has led to weakness or deconditioning, exercise physiology can work alongside physiotherapy to build the strength and movement patterns that take load off the affected structures over time.

Most people with nerve-related leg symptoms do improve with the right management. Getting clarity on what's actually happening is the most useful first step.

The bottom line

Persistent pins and needles in your leg is your nervous system telling you something needs attention. In most cases it's a compression or irritation somewhere along the nerve's path and it can be properly assessed and managed. If you're experiencing any of the red flag symptoms, see a doctor. If you're not, getting assessed sooner tends to produce better outcomes than waiting it out.

If your symptoms sound musculoskeletal, find your nearest Move Beyond clinic and book an assessment with one of our Physiotherapists or Osteopaths.