If your knee feels reasonably comfortable when walking on flat ground but hurts when you go downstairs, you are not alone.

People often describe:

• Pain at the front of the knee
• Pain behind the kneecap
• Sharp pain when stepping down
• Pain when the knee bends under body weight
• Clicking or grinding on stairs
• Pain going downstairs but not upstairs
• Pain after sitting and then standing up
• Pain when squatting or kneeling

One common explanation is patellofemoral pain, which refers to pain around or behind the kneecap. Stair climbing and stair descent are well-recognised aggravating activities because they increase load through the patellofemoral joint.

However, kneecap-related pain is not the only possible cause.

Persistent stair pain may also involve structures such as the meniscus, cartilage, tendons or other parts of the knee.

The right next step depends on where the pain is, how long it has been present, whether there was an injury, and whether treatment has helped.

Why Does My Knee Hurt More Going Down Stairs?

Walking downstairs requires the knee to bend while your leg controls the lowering of your body weight.

This places substantial demand on:

• Quadriceps muscles
• Kneecap joint
• Cartilage
• Tendons
• Other structures within the knee

If one of these structures is irritated or not tolerating load well, descending stairs may reproduce pain very reliably.

This is why some patients say:

“Walking is fine, but stairs hurt.”

or:

“Going up isn’t too bad, but coming down is painful.”

The pattern itself provides useful diagnostic information, but it does not prove one specific diagnosis.

The Most Common Cause: Patellofemoral Pain

Patellofemoral pain is a common cause of pain around the front of the knee or behind the kneecap.

Typical symptoms can include:

• Pain around or behind the kneecap
• Pain on stairs
• Pain during squatting
• Pain after sitting for a prolonged period
• Pain when running
• Aching at the front of the knee
• Clicking or grinding sensations

NHS musculoskeletal guidance describes stair climbing and descent, squatting, prolonged sitting and running as common aggravating activities.

Patellofemoral pain does not necessarily mean that something is badly damaged.

Several factors can contribute, including how much load the knee has recently been exposed to and how well the muscles around the hip and thigh are managing that load.

Does Pain Going Down Stairs Mean My Knee Cartilage Is Worn Out?

Not necessarily.

Stair pain can occur in people with cartilage changes, but it can also occur without major cartilage damage.

Possible causes can include:

• Patellofemoral pain
• Early or established osteoarthritis
• Meniscus problems
• Tendon irritation
• Previous injury
• Changes in muscle strength or control
• Multiple factors occurring together

Age can affect the likelihood of degenerative changes, but symptoms alone cannot reliably tell you how much cartilage wear is present.

Imaging may sometimes help when the diagnosis remains uncertain.

Could It Be Knee Osteoarthritis?

Yes, particularly in older adults or people with other symptoms of degenerative joint change.

Knee osteoarthritis may cause:

• Pain with weight-bearing
• Stiffness
• Pain on stairs
• Reduced movement
• Swelling in some cases
• Grinding or creaking

An X-ray may provide useful information about established osteoarthritis.

However, the amount of arthritis visible on imaging does not always match the amount of pain a person experiences.

Someone can have significant X-ray changes with relatively little pain, while another person may experience substantial symptoms with less dramatic imaging findings.

Could It Be a Meniscus Problem?

Possibly.

The menisci are cartilage structures inside the knee that help with load distribution and joint function.

Meniscus problems can sometimes cause:

• Pain along the inner or outer joint line
• Pain when twisting
• Pain with deep knee bending
• Catching
• Locking
• Swelling
• Pain during stairs

MRI can provide detailed images of the meniscus and is commonly used when meniscus injury or degeneration is clinically suspected.

However, meniscus changes are also commonly seen on MRI in people who do not have significant symptoms.

The scan therefore needs to be interpreted together with the examination.

What if the Pain Is Directly Under My Kneecap?

Pain around or behind the kneecap makes patellofemoral pain one possibility.

Patients may describe this as:

• Kneecap pain
• Pain behind the patella
• Pain under the kneecap
• Front knee pain
• Pain when bending
• Pain after prolonged sitting

The patellofemoral joint is where the kneecap interacts with the thigh bone.

Activities such as stairs and squats increase loading through this region, which is why these movements commonly reproduce symptoms in patellofemoral pain.

What if the Pain Is on the Inner Side of My Knee?

Inner-side or medial knee pain can have several possible causes.

Structures in this region include:

• Medial meniscus
• Medial collateral ligament
• Tendons
• Joint surfaces
• Surrounding soft tissues

The location of pain is useful information, but location alone is not enough to determine the diagnosis.

For example, meniscus problems, osteoarthritis and tendon-related conditions can all produce pain on the inner side of the knee.

What if the Pain Is on the Outer Side?

Outer or lateral knee pain may potentially involve:

• Lateral meniscus
• Lateral joint structures
• Tendons
• Iliotibial-band-related structures
• Other surrounding tissues

Again, examination helps narrow down the possibilities.

What if the Pain Is Behind the Knee?

Pain at the back of the knee can arise from several structures.

Possible explanations can involve:

• Tendons
• Muscles
• Meniscus
• Joint structures
• Fluid collections
• Other soft tissues

Some conditions behind the knee may be better initially assessed with ultrasound, while others may require MRI.

The appropriate scan depends on what is suspected clinically.

My Knee Clicks When Going Downstairs. Is That Serious?

Not necessarily.

Clicking, grinding or crackling around the kneecap can occur with patellofemoral pain and can also occur in people without significant knee disease.

NHS guidance specifically notes that clicking or grinding can occur in patellofemoral pain and does not by itself mean that movement is damaging the joint.

Clicking becomes more concerning when it is accompanied by symptoms such as:

• True locking
• Significant swelling
• Giving way
• Severe pain
• Recent injury

My Knee Gives Way on Stairs. What Does That Mean?

“Giving way” can mean different things to different people.

Some people describe a brief feeling that the knee cannot support them because of pain.

Others experience genuine instability from ligament or other structural problems.

This distinction matters.

If your knee repeatedly collapses, feels unstable or has changed after a significant injury, medical assessment is appropriate.

Why Does My Knee Hurt Going Downstairs but Not Walking?

Walking on level ground generally places different demands on the knee compared with stair descent.

Going downstairs requires:

• Greater knee bending
• Greater quadriceps control
• Greater load through the patellofemoral joint

A knee problem may therefore become painful on stairs before it becomes painful during ordinary walking.

This pattern is especially common in anterior or patellofemoral knee pain.

Why Does My Knee Hurt Going Downstairs but Not Upstairs?

Descending stairs requires the thigh muscles to control your body as it lowers.

Some knee problems are more sensitive to this type of loading.

However, the distinction between pain upstairs and downstairs is not sufficient on its own to diagnose the problem.

Both directions can provoke patellofemoral symptoms.

Should I Stop Using Stairs?

Not necessarily.

Completely avoiding stairs for long periods can reduce activity and does not address the underlying reason the knee is painful.

However, if every stair causes significant pain, temporarily reducing the amount of provocative activity may be sensible while the problem is assessed.

A rehabilitation plan can then gradually restore tolerance.

The aim is usually not permanent avoidance.

The goal is to make the knee capable of handling normal daily loads again.

Will Strengthening Exercises Help?

They often can, depending on the diagnosis.

For patellofemoral pain, structured exercise is a common treatment approach, including rehabilitation addressing the thigh and hip muscles.

However, simply being told:

“Your knee hurts, so strengthen your quads.”

may be too simplistic.

The appropriate programme depends on:

• Current pain level
• Strength
• Mobility
• Activity requirements
• Diagnosis
• What movements are currently tolerated

If an exercise repeatedly causes significant worsening, the solution is not always to keep forcing the same exercise harder.

The programme may need to be modified.

What if Exercises Make My Knee Pain Worse?

Exercise can sometimes cause temporary discomfort during rehabilitation.

But persistent worsening deserves reassessment.

Questions worth asking include:

• Is the exercise appropriate for the suspected diagnosis?
• Is the load too high?
• Is the volume too high?
• Is the movement being performed appropriately?
• Has the original diagnosis been reconsidered?
• Is there another structure contributing to the pain?

If you have spent weeks or months performing exercises without meaningful improvement, it may be reasonable to reassess rather than automatically repeat the same programme.

I’ve Tried Physiotherapy but Stairs Still Hurt. What Next?

This is a common reason patients seek a second assessment.

Not improving after physiotherapy does not necessarily mean physiotherapy was inappropriate.

But it raises useful questions:

• Was the diagnosis correct?
• Was the rehabilitation programme appropriate?
• Was enough time allowed?
• Was the programme progressed appropriately?
• Are there symptoms suggesting another problem?
• Would imaging provide information that could change treatment?

Sometimes the answer is to continue rehabilitation differently.

Sometimes further investigation is appropriate.

The key is not to assume that more of exactly the same treatment is always the answer.

Do I Need an X-Ray?

An X-ray may be useful when a doctor wants to assess:

• Osteoarthritis
• Bone alignment
• Fracture
• Certain bone abnormalities

For older patients with persistent knee pain, an X-ray can sometimes be an appropriate first imaging test.

But X-rays do not show all knee structures in the same detail as MRI.

Do I Need an MRI?

Not everyone with stair pain requires MRI.

MRI becomes more useful when:

• Symptoms persist despite appropriate treatment
• The diagnosis remains unclear
• There was significant injury
• The knee locks
• Instability is present
• There is recurrent swelling
• A meniscus, ligament or cartilage problem is suspected
• Imaging findings could change treatment

Knee MRI provides detailed images of bones, cartilage, tendons, ligaments, muscles and other structures and does not use ionising radiation.

What Can a Knee MRI Show?

Depending on the clinical question, knee MRI can help assess:

• Meniscus
• ACL and PCL
• Collateral ligaments
• Cartilage
• Tendons
• Bone marrow
• Joint structures
• Some fractures not seen clearly on X-ray
• Arthritis-related changes

RadiologyInfo identifies knee pain, damaged cartilage, meniscus injuries, ligament injuries and kneecap pain among common reasons for knee MRI.

How Much Does a Knee MRI Cost in Singapore?

For many patients arranging a knee MRI through The Pain Relief Clinic, the current price is approximately:

S$1,000

This generally includes:

• MRI scan
• MRI images
• Formal radiologist’s report

For eligible outpatient scans, up to S$600 per patient per year may currently be withdrawn from MediSave, subject to prevailing eligibility requirements and the patient’s remaining annual limit.

How Quickly Can I Get a Knee MRI?

If MRI is medically appropriate, The Pain Relief Clinic can often arrange a knee MRI:

Within one working day

subject to MRI safety screening and appointment availability.

This can be useful if pain has continued despite treatment and you want additional information before deciding what to do next.

Does Knee MRI Use Radiation?

No.

MRI does not use ionising radiation.

It uses a strong magnetic field, radiofrequency pulses and computer processing to create detailed images.

Does Knee Pain on Stairs Mean I Need Surgery?

No.

Most people with knee pain on stairs do not automatically require surgery.

Treatment depends on the underlying problem.

Options may include:

• Activity modification
• Physiotherapy
• Strengthening
• Load management
• Medication where appropriate
• Other non-surgical treatments
• In selected cases, injections
• Surgery where genuinely indicated

The presence of pain alone does not determine whether surgery is necessary.

What if My MRI Shows Cartilage Damage?

The treatment depends on:

• Severity
• Location
• Symptoms
• Age
• Activity level
• Other knee findings
• Functional limitations

A cartilage abnormality on MRI does not automatically mean surgery is required.

The imaging finding should be interpreted alongside the clinical picture.

What if MRI Shows a Meniscus Tear?

Again, a meniscus tear does not automatically mean surgery.

Some meniscus problems can be managed conservatively.

Treatment depends on factors such as:

• Type of tear
• Symptoms
• Mechanical locking
• Age
• Activity needs
• Associated knee problems

The MRI is one part of the decision.

When Should Knee Pain Be Checked Urgently?

Seek urgent medical attention if:

• You cannot put weight on the leg after a significant injury
• The knee has changed shape
• There is very severe pain after trauma
• The knee becomes rapidly and severely swollen
• The knee is hot, red and you feel unwell
• There are other symptoms suggesting a medical emergency

The NHS also advises urgent assessment when the knee is very painful, cannot be moved or cannot bear weight, or is badly swollen or deformed.

Frequently Asked Questions About Knee Pain Going Down Stairs

Why does my knee hurt when going downstairs?

A common cause is patellofemoral pain around or behind the kneecap, although cartilage, meniscus, tendon and arthritic problems can also cause stair pain.

Why is going downstairs worse than walking?

Stair descent requires more knee bending and greater control from the thigh muscles, increasing load through the knee and patellofemoral joint.

Does stair pain mean my cartilage is damaged?

Not necessarily. Cartilage changes are one possibility, but stair pain can occur for several reasons.

Can meniscus problems hurt when going downstairs?

Yes. Meniscus problems can cause pain with weight-bearing, twisting and bending, although symptoms alone cannot confirm a meniscus diagnosis.

Is clicking on stairs dangerous?

Usually not by itself. Clicking and grinding can occur with patellofemoral pain without indicating ongoing damage.

Should I exercise if stairs hurt?

Exercise can be helpful for many knee problems, but the programme should be appropriate for your diagnosis and current tolerance.

When should I consider MRI?

MRI may be considered when pain remains persistent, the diagnosis is unclear, treatment has not helped as expected, or structural problems such as meniscus, ligament or cartilage injury are suspected.

How much does a knee MRI cost?

A knee MRI arranged through The Pain Relief Clinic is currently approximately S$1,000, including images and a formal radiologist’s report.

Knee Pain Still Hurting on Stairs?

If knee pain is affecting stairs, walking, exercise or daily activities and has not improved as expected, it may be worth reassessing rather than simply continuing the same treatment indefinitely.

At The Pain Relief Clinic, we can assess:

• Where the pain is coming from
• Whether your current diagnosis still fits
• Whether further imaging may be useful
• Whether treatment needs to change
• Whether rehabilitation or other non-surgical approaches are appropriate

When MRI is medically indicated, we can often arrange imaging within one working day.

Assessment and imaging access through The Pain Relief Clinic

• Medical assessment by a licensed medical doctor
• In-house physiotherapy
• MRI often available within one working day
• Approximately S$1,000 for many knee MRI examinations
• Up to S$600 MediSave for eligible outpatient scans
• 1.5T and 3T MRI options depending on requirements
• Formal radiologist’s report
• Non-surgical treatment options where appropriate

Arrange a Knee Pain Assessment

The Pain Relief Clinic

Call / WhatsApp: +65 9068 9605

If your knee has been painful on stairs for weeks or months despite treatment, contact us for an assessment of whether further investigation or a different treatment approach may be appropriate.

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References

1. RadiologyInfo.org, American College of Radiology and Radiological Society of North America — MRI of the Knee, reviewed June 2026.
2. NHS Dynamic Health — Patellofemoral Knee Pain.
3. NHS University Hospitals of Liverpool Group — Patellofemoral Pain.
4. NHS — Knee Pain.

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Important Medical Information

This article provides general information and does not replace an individual medical assessment.

Knee pain when using stairs can arise from several different conditions. Symptoms alone cannot determine whether the problem involves the kneecap joint, cartilage, meniscus, tendons, ligaments, arthritis or another structure.

MRI is not required for every case of knee pain. The appropriate investigation depends on the history, physical examination, severity, duration, previous treatment and clinical question.

Seek urgent medical attention after significant trauma, if you cannot bear weight, if the knee is severely swollen or deformed, if the knee becomes hot and red with systemic illness, or if other symptoms suggest a medical emergency.

Reviewed by Dr Terence Tan, Founder of The Pain Relief Clinic — 18 September 2026