Understanding Back Pain: Causes, Sciatica and How to Manage It

Lower back pain can make even simple activities feel surprisingly difficult.

Getting out of bed, sitting at your desk, picking up your children, exercising or simply finding a comfortable sleeping position can suddenly become a challenge.

For some people, back pain appears unexpectedly and settles within a few weeks. For others, symptoms continue for months, fluctuate over time or extend into the buttock and leg.

So what causes these different experiences, and what should you actually do about them?

Understanding the type of back pain you’re experiencing can be useful, but it is equally important to recognise that pain does not always provide a straightforward indication of what is happening within the tissues.

At RHP Physiotherapy in Kelvin Grove, Brisbane, we assess people experiencing acute lower back pain, persistent back pain and sciatica, considering their symptoms, physical capacity and the activities that matter to them.

This guide explains the differences between these presentations, their possible causes, practical ways to manage symptoms and when to seek further assessment.

What Are the Different Types of Lower Back Pain?

There are several ways of describing back pain.

One common approach is to classify it by how long symptoms have been present.

These categories overlap.

For example, someone may develop acute lower back pain with sciatica, while another person might experience recurring episodes of back pain without any leg symptoms.

Knowing the duration and distribution of symptoms helps guide assessment, but it is only one part of the picture.

1. Acute Lower Back Pain: Why Has My Back Suddenly Started Hurting?

Acute lower back pain is pain that has developed recently, usually within the previous six weeks.

It can begin suddenly.

You might bend to pick something up, stand after sitting for a long time or wake up one morning with substantial discomfort.

Sometimes there is an identifiable event.

Other times, there is no obvious explanation.

Importantly, sudden or severe pain does not automatically mean that significant tissue damage has occurred.

What Causes Acute Back Pain?

There are many potential contributors.

Some episodes occur following a specific physical event, such as a fall or an unfamiliar lifting task.

Others develop during ordinary activities that the person has completed many times before.

Possible presentations include:

• Muscle or other soft-tissue injury.
• Irritation involving spinal joints or discs.
• Increased sensitivity during particular movements.
• A flare-up of a previous back pain episode.
• Less commonly, a specific medical or structural condition requiring further investigation.

However, most episodes of lower back pain are described as non-specific low back pain.

This means that a serious or clearly identifiable underlying disease has not been found, and symptoms cannot be confidently attributed to one precise anatomical structure.

It does not mean the pain is imaginary or that nothing is happening.

It means our understanding of the pain needs to extend beyond trying to identify one damaged muscle, disc or joint.

What Does Acute Back Pain Feel Like?

Symptoms can vary considerably.

They may include:

• A sharp pain during certain movements.
• A deep ache across the lower back.
• Muscle guarding or spasm.
• Difficulty bending or straightening.
• Pain when changing from sitting to standing.
• Discomfort extending into the buttocks or upper legs.
• Reduced confidence with normal movement.

These symptoms can be very unpleasant, but their intensity does not reliably identify which tissue is involved or how much damage has occurred.

Likewise, the presence of pain during movement does not always mean that movement is causing further injury.

How Long Does Acute Back Pain Last?

Many episodes of acute back pain improve substantially over the first few weeks.

However, recovery is not identical for everyone.

Some people improve quickly, while others continue to experience symptoms or repeated flare-ups.

It is also common for symptoms to fluctuate during recovery.

Feeling better on one day and more uncomfortable the next does not automatically mean the condition is deteriorating.

The important consideration is the broader trend in symptoms, movement and ability to participate in normal activities.

Should You Rest When Your Back Suddenly Becomes Painful?

Some temporary modification to your activities may be sensible, particularly when symptoms are severe.

But prolonged bed rest is generally not recommended for uncomplicated acute lower back pain.

Australian clinical guidelines encourage people to remain as active as reasonably possible and progressively return to normal activities.

This might involve:

• Taking short walks.
• Changing positions regularly.
• Temporarily reducing particularly demanding activities.
• Continuing manageable work or household tasks.
• Gradually rebuilding normal movement.

There is no requirement to push through severe or escalating pain.

The goal is to maintain useful activity at a level the person can currently tolerate.

For more specific self-management advice, read our article What Can I Do About My Low Back Pain and When Should I Seek Help?

2. Chronic Back Pain: Why Does Lower Back Pain Sometimes Persist?

Chronic or persistent lower back pain is generally defined as pain continuing for more than three months.

It may develop from an initially acute episode or emerge more gradually over time.

Some people experience continuous discomfort.

Others have periods where symptoms improve, followed by flare-ups that interrupt their work, exercise or normal routines.

One of the most important things to understand is that persistent pain does not necessarily mean a tissue has failed to heal.

What Causes Chronic Lower Back Pain?

The original injury or physical event may be relevant, but persistent pain can be influenced by a broader range of factors.

These may include:

• Ongoing sensitivity in the nervous system.
• Changes in physical activity or conditioning.
• Previous episodes of back pain.
• Sleep quality.
• Stress and other life circumstances.
• Expectations and beliefs about movement.
• Confidence in the body’s ability to tolerate activity.
• Work, family and social demands.
• Specific medical or spinal conditions in some individuals.

These factors do not operate independently.

For example, pain may interrupt sleep, poor sleep may influence pain sensitivity, and reduced physical activity may affect confidence and physical capacity.

These interactions can be difficult to separate into simple categories.

They also vary between individuals and can change over time.

Does Chronic Pain Mean Something Is Still Damaged?

Not necessarily.

In some conditions, ongoing tissue pathology may contribute to symptoms.

In others, the original injury may have healed while pain continues.

Persistent pain can involve changes in the way sensory information is processed and interpreted across the nervous system.

This does not mean the pain is psychological or imaginary.

The experience is real, and it can substantially affect function and quality of life.

But it also means treatment does not always need to focus on finding and repairing one supposedly damaged structure.

Our Chronic Pain Physiotherapy service considers these broader influences alongside the person’s physical capacity, symptoms and goals.

What About Arthritis, Disc Degeneration and Other MRI Findings?

Some people experiencing persistent lower back pain are told that imaging has shown disc degeneration, arthritis or a disc bulge.

These findings can sound concerning.

However, many structural changes seen on spinal imaging also occur in people who have no back pain.

The frequency of some findings increases with age.

This does not mean imaging findings are always irrelevant.

In certain clinical presentations, they may help explain symptoms and guide treatment decisions.

But an MRI finding should be interpreted alongside the person’s symptoms and examination rather than automatically assumed to be the cause of pain.

What Helps With Chronic Lower Back Pain?

The World Health Organization’s 2023 guideline for chronic primary lower back pain supports individualised, non-surgical management.

Depending on the person, care may include:

• Education about pain and recovery.
• Progressive physical activity.
• Individualised exercise programs.
• Strength and conditioning.
• Strategies to rebuild confidence with movement.
• Support for sleep or other relevant health factors.
• Psychological approaches such as cognitive behavioural therapy when appropriate.
• Selected hands-on treatments as part of a broader management plan.

The aim is not simply to reduce pain during a treatment appointment.

It is to improve what the person can do and how confidently they can interact with their everyday environment.

For some people, that means returning to running or sport.

For others, it means working comfortably, caring for children, walking longer distances or participating in social activities without being dominated by their symptoms.

3. Sciatica: Why Does Back Pain Travel Into the Leg?

Sciatica is a term commonly used to describe pain that travels from the lower back or buttock into the leg.

In many cases, this involves irritation or dysfunction of one or more nerve roots as they exit the lumbar spine.

This is often referred to as lumbar radicular pain.

Sciatica may occur alongside lower back pain, but some people experience much more leg pain than back pain.

What Causes Sciatica?

Potential contributors include:

• A lumbar disc herniation affecting a nerve root.
• Narrowing around a spinal nerve root.
• Age-related changes in spinal structures.
• Other conditions that irritate or affect a nerve.

Disc-related irritation is one common explanation, but not every person with leg pain has a disc herniation.

And not every disc bulge seen on an MRI is responsible for symptoms.

The diagnosis should consider the pattern of symptoms, physical examination and relevant medical history.

What Are the Symptoms of Sciatica?

Symptoms can include:

• Pain extending from the buttock into the thigh or calf.
• Shooting, burning or electric-shock-like pain.
• Tingling or pins and needles.
• Numbness in part of the leg or foot.
• Weakness in certain muscle groups.
• Symptoms that change with particular positions or movements.

Many people describe symptoms travelling below the knee, but the exact distribution varies depending on the structures involved.

Sciatica most commonly affects one leg, although symptoms can sometimes occur on both sides.

New bilateral leg symptoms, particularly when accompanied by changes in bladder or bowel function or sensation around the groin, require urgent medical assessment.

Is All Pain That Travels Into the Leg Sciatica?

No.

Some back-related pain can be experienced in the buttock, hip or thigh without a lumbar nerve root being the primary source.

Likewise, conditions involving the hip, peripheral nerves and other tissues can sometimes produce symptoms that resemble sciatica.

This distinction is important because different presentations may require different management.

A useful assessment considers:

• The distribution and behaviour of symptoms.
• Whether there is numbness, tingling or weakness.
• Reflexes and muscle strength when appropriate.
• Movement and neurological examination findings.
• The person’s history and activity limitations.

Simply describing all leg pain as sciatica can miss important differences between conditions.

How Is Sciatica Managed?

Many cases improve with time and appropriate conservative care.

Management depends on symptom severity, neurological findings and the person’s response to activity.

It may include:

• Education about symptoms and recovery.
• Finding tolerable positions and movements.
• Maintaining or gradually restoring normal activity.
• Progressive exercise when appropriate.
• Monitoring any neurological symptoms.
• Medical review when medication, imaging or specialist assessment may be indicated.

For persistent or severe sciatica, particularly with progressive neurological deficits or substantial ongoing functional limitations, specialist assessment may be appropriate.

There is no single exercise or stretch that resolves every presentation of sciatica.

In some cases, aggressive stretching of an irritated nerve may actually aggravate symptoms.

Assessment helps determine which activities and interventions are suitable for the individual.

4. What Else Can Contribute to Lower Back Pain?

While acute, chronic and sciatica-related pain are useful categories, they do not account for every contributor to back symptoms.

A person’s experience may also be influenced by changes in activity, health, lifestyle and their environment.

Physical Activity and Training Load

Someone returning to the gym after several months away may find that their back becomes uncomfortable during unfamiliar loading.

Likewise, a runner, golfer or footballer might develop symptoms after a substantial change in training.

That does not necessarily mean the movement is dangerous.

Often, the useful question is whether the physical demand exceeded what the person was currently prepared to tolerate.

For active people managing spinal pain, our Sports Physiotherapy and Return to Sport services can help guide progressive loading and activity goals.

Work and Prolonged Sitting

Back pain is often attributed to poor sitting posture.

However, research does not support one universally correct posture that prevents lower back pain.

Some people find prolonged sitting uncomfortable, while others tolerate it without difficulty.

Similarly, standing for extended periods can be uncomfortable for some individuals.

Changing position, taking movement breaks and building tolerance to the activities required at work may be more helpful than continuously trying to maintain one ideal posture.

Sleep, Stress and Pain Sensitivity

Sleep and stress can influence the experience of pain.

For example, someone who is sleeping poorly may experience greater pain sensitivity or find their usual activities more difficult to manage.

Stressful periods can also influence sleep, attention, muscle activity and patterns of physical activity.

This does not mean stress is necessarily the cause of someone’s back pain.

It means that these interactions may be worth exploring when they are relevant to the individual.

Good assessment is not about placing every influence into a separate category. It is about understanding how those influences interact in the person’s life.

5. How to Manage Lower Back Pain at Home

For many people with uncomplicated lower back pain, there are several useful strategies to try while symptoms are settling.

These should be adapted to the person’s circumstances and do not replace medical assessment when serious symptoms are present.

Keep Moving Where Possible

For most uncomplicated episodes of lower back pain, continuing manageable movement is preferable to prolonged bed rest.

Walking, changing position and gradually returning to normal activities can be useful.

Start at a level you can tolerate rather than trying to immediately return to your usual maximum activity.

Modify Activities Rather Than Avoiding Everything

If a particular task significantly aggravates symptoms, it may be appropriate to modify how much you do or how often you do it for a short period.

For example, you might:

• Break a long walk into shorter periods.
• Reduce the load of a gym exercise temporarily.
• Take more frequent movement breaks during work.
• Spread demanding household tasks across the day.
• Progressively rebuild activity as tolerance improves.

The aim is not permanent avoidance.

It is to maintain participation while allowing a manageable progression towards normal activity.

Use Heat or Other Comfort Measures if Helpful

Some people find superficial heat soothing during an acute episode of lower back pain.

Others prefer different comfort strategies.

Heat may offer temporary symptom relief, but it does not need to be viewed as repairing a particular spinal structure.

Choose a safe and comfortable approach that helps you continue appropriate activity.

Consider Pain Relief With Appropriate Advice

Medication may help some people manage symptoms, particularly when pain is significantly limiting normal activity.

However, medication choices depend on a person’s medical history, other medications and the potential benefits and risks.

Over-the-counter medicines are not automatically suitable for everyone.

Speak with a GP or pharmacist about whether pain medication is appropriate rather than assuming a particular medicine is the best treatment for all lower back pain.

Build Strength and Physical Capacity Progressively

For persistent or recurrent back pain, an individualised exercise program can help restore confidence and improve physical function.

The most appropriate exercises depend on the person.

Programs may include:

• General resistance training.
• Walking or other aerobic exercise.
• Trunk and lower-limb strengthening.
• Gradual exposure to bending and lifting.
• Sport-specific or work-specific conditioning.

There is no single exercise that is essential for every person with back pain.

For those needing structured exercise support, our Exercise Physiology service can complement physiotherapy care.

For more practical self-care advice, see What Can I Do About My Low Back Pain and When Should I Seek Help?

6. When Should You See a Physiotherapist or Doctor for Back Pain?

Many episodes of uncomplicated lower back pain improve without extensive investigations or treatment.

However, professional advice may be useful when:

• Pain is severely limiting normal activities.
• Symptoms are not improving as expected.
• Back pain repeatedly returns.
• There is uncertainty about what activities are appropriate.
• Pain extends into the leg.
• Numbness, tingling or weakness develops.
• Symptoms are affecting work, sleep or quality of life.

A physiotherapist can assess the presentation, screen for indicators of more serious conditions and help develop an appropriate management plan.

Some presentations require medical review or specialist involvement.

7. Do You Need an MRI or X-Ray for Lower Back Pain?

Not necessarily.

Many people understandably feel that obtaining a scan is the best way to discover exactly why their back hurts.

But imaging is not routinely recommended for uncomplicated lower back pain.

The Australian Low Back Pain Clinical Care Standard advises against routine imaging when there are no features suggesting serious underlying pathology.

This is partly because scans frequently identify structural changes that are also found in people without pain.

These may include:

• Disc degeneration.
• Disc bulges.
• Facet joint changes.
• Other age-associated spinal findings.

Finding one of these changes does not automatically identify the cause of the person’s symptoms.

Unnecessary imaging can sometimes increase concern or lead to further investigations that do not improve outcomes.

However, imaging can be very important when the presentation suggests serious pathology, significant neurological compromise or when the findings are likely to influence specialist treatment decisions.

The right question is not simply whether an MRI can identify a spinal change.

It is whether imaging will help answer a relevant clinical question and change management.

8. How Can Physiotherapy Help With Back Pain?

Physiotherapy for lower back pain should begin with understanding the person and their presentation.

Rather than automatically applying the same exercises or treatment to everyone, assessment may explore:

• How and when symptoms developed.
• Which activities currently feel difficult.
• The behaviour and distribution of pain.
• Relevant neurological findings.
• Previous episodes and treatment experiences.
• Current physical capacity.
• Sleep, work and other relevant circumstances.
• The person’s goals and expectations.

From there, management can be adapted to what the person needs.

Education and Self-Management

Understanding the likely course of a back pain episode and what activities are appropriate can help reduce uncertainty.

Clear advice should provide enough information for someone to manage their symptoms and make decisions with confidence.

This can be particularly valuable for people who have become concerned about bending, lifting or returning to exercise.

Exercise and Progressive Loading

Exercise is an important component of care for many people with persistent or recurrent back pain.

Programs should be developed according to the person’s current capacity and goals.

For example, a parent wanting to lift their toddler comfortably may need a different progression from a footballer returning to high-intensity training.

The basic principle remains similar: progressively develop the physical capacity required for meaningful activities.

Manual Therapy and Other Treatments

Manual therapy, including joint mobilisation and soft-tissue techniques, can be useful for short-term symptom relief in selected individuals.

However, it is generally best considered as one component of care rather than a treatment that permanently corrects the underlying cause of back pain.

Exercise, education and active self-management usually remain important.

Returning to Work, Exercise or Sport

For people whose symptoms affect work or sport, physiotherapy may also involve gradually restoring tolerance to specific tasks.

These could include prolonged standing, lifting, running, gym training or sporting movements.

At RHP, our Sports Physiotherapy and Return to Sport services can support athletes returning from back pain when higher-level physical preparation is appropriate.

Frequently Asked Questions About Back Pain and Sciatica

Understanding and Managing Back Pain in Brisbane

At RHP Physiotherapy in Kelvin Grove, Brisbane, we recognise that back pain can affect far more than the ability to bend or lift.

It may influence someone’s work, exercise, family responsibilities, confidence and participation in everyday life.

Our approach is to understand those interactions and develop a practical plan around what matters to the individual.

Depending on the presentation, the following services may be relevant:

• Lower Back Pain Physiotherapy for assessment and management of acute back pain, recurring symptoms and sciatica-related presentations.
• Chronic Pain Physiotherapy for persistent pain affecting function and everyday participation.
• Physiotherapy for individualised assessment, education and movement-based rehabilitation.
• Exercise Physiology for structured physical activity and capacity development.
• Sports Physiotherapy for athletes managing back pain or rebuilding their sporting capacity.

The goal is not simply to identify which movement hurts.

It is to understand why the presentation is occurring, what may be influencing it and how to improve the person’s ability to participate in the activities they value.

This information is intended for general education and does not replace assessment or advice from a qualified healthcare professional.

Author in the know

Sam Donaldson

Director, APA titled Sports and Exercise Physiotherapist. Sam loves to treat athletes with lower limb injuries and has a special interest in knees of all ages; adolescent knee pain, athlete with knee pain, ACL injuries, ACL rehabilitation, Knee Osteoarthritis and Knee Replacement recovery. He is a Dad, Football enthusiast and loves to move. BAppSci (HMS), MPhtyStudies, MPHTY (Sports)