Sciatica — Understanding Referred Leg Pain

If you have ever felt pain that starts in your lower back or buttock and travels down into your leg, you may have experienced sciatica. It is one of the most common reasons people seek help from a chiropractor, and also one of the most misunderstood. Many people assume sciatica means something is seriously wrong with their spine. Sometimes it does warrant further investigation, but in most cases it can be managed well with the right approach.

This article explains what sciatica actually is, what causes it, and when chiropractic care may be a reasonable option. I have tried to be straightforward about what the evidence supports and where the limits are.

What is sciatica?

Sciatica refers to pain that follows the path of the sciatic nerve. This nerve is the longest and thickest in the body, running from the lower lumbar spine through the buttock and down the back of each leg. When it becomes irritated or compressed near its origin, pain can radiate — or be "referred" — a long way from where the actual problem is.

The term sciatica describes a symptom pattern, not a specific diagnosis. It tells us the nerve is unhappy, but it does not tell us why. Working out the why is what matters, because the cause shapes the approach.

Common causes

Several structures in and around the lower spine can irritate the sciatic nerve. The most common culprits include:

• Disc herniation — the inner material of a spinal disc bulges outward and presses against a nerve root. This is the cause most people have heard of, and it does account for a significant proportion of sciatica cases. However, it is worth knowing that many disc herniations improve on their own over time without surgery.
• Spinal stenosis — a narrowing of the spinal canal or the openings where nerves exit the spine. This is more common in older adults and tends to develop gradually.
• Piriformis syndrome — the piriformis muscle sits deep in the buttock, close to the sciatic nerve. When this muscle becomes tight or inflamed, it can compress the nerve and produce symptoms that feel very similar to disc-related sciatica.

Each of these responds somewhat differently to treatment, which is why a careful assessment is important before deciding on a course of action.

Recognising the symptoms

Sciatica can feel different from person to person, but common features include:

• Shooting or burning pain that travels from the lower back or buttock into the leg — sometimes as far as the foot
• Numbness or reduced sensation in part of the leg, calf, or foot
• Tingling or pins and needles along the nerve path
• Weakness in the affected leg — for example, difficulty lifting the foot when walking
• Symptoms that change with position — many people find sitting makes things worse, while walking or lying down may feel better

The pattern of symptoms often provides useful clues about where the nerve is being affected. That is something we assess carefully during a consultation.

How chiropractic care may help

There is moderate evidence supporting conservative care — including manual therapy — as a reasonable first-line approach for most presentations of sciatica (Lewis et al., Spine Journal, 2015). What that looks like depends entirely on what we find when we assess you.

Care typically involves a combination of:

• Assessment to identify the cause — through movement testing, neurological screening, and orthopaedic tests, we can usually determine whether the problem is disc-related, muscular, or something else. This guides everything that follows.
• Manual therapy — mobilisation or manipulation of the lumbar spine, aimed at reducing stiffness and taking pressure off the affected nerve. In acute sciatica, these techniques are adapted to be very low-force.
• Directional preference exercises — specific movements that may help centralise your symptoms, meaning the pain retreats from the leg back toward the lower back. When these work, they can provide meaningful relief and are something you can do at home multiple times a day.
• Activity modification — practical advice on sitting, sleeping, and daily movement that can reduce load on the nerve while you recover. Sometimes small adjustments make a noticeable difference.

I want to be honest: not all sciatica responds to conservative care. Some cases — particularly those involving significant neurological deficit or large disc herniations — may need imaging and referral to a specialist. If I think that applies to your situation, I will tell you directly and help you get to the right person.

When to see your GP urgently

Most sciatica, while painful and disruptive, is not dangerous. However, there is a rare condition called cauda equina syndrome that requires immediate medical attention. Please go to your nearest emergency department or call 000 if you experience any of the following alongside leg pain:

• Loss of bladder or bowel control — inability to urinate, or incontinence
• Numbness in the saddle area — inner thighs, groin, or genitals
• Rapidly worsening weakness in one or both legs
• Severe pain that does not respond to any change in position

Cauda equina syndrome is uncommon, but it needs to be acted on quickly. If you are unsure whether your symptoms warrant urgent care, it is always better to check.

Being realistic about recovery

Sciatica recovery is not always straightforward. Some people improve quickly, others take weeks or longer. A few things that are helpful to understand:

• If your leg pain starts to retreat back toward the buttock or lower back, that is generally a good sign — even if the back pain feels temporarily worse
• Gentle movement, particularly walking, is usually better than rest
• Flare-ups during recovery do not necessarily mean something has gone wrong. Nerves take time to settle

The goal of care is symptomatic relief and functional improvement — helping you move better and get back to daily life. I do not claim to fix disc herniations or reverse structural changes. What I can offer is a clear assessment, an honest opinion, and a plan that makes sense for your situation.

Further reading

If you would like more detail on sciatica — including what causes it, what recovery looks like, and when to seek urgent care — our sciatica conditions page covers each of these topics in depth. You may also find our pages on back pain and what to expect at your first visit useful.