If your knee hurts mainly when you climb stairs, walk uphill, squat or rise from a chair, the pattern can provide useful clues about what may be irritating the joint.

A very common explanation is patellofemoral pain, which causes pain around or behind the kneecap. Stair climbing is one of the activities that commonly aggravates it because bending the knee under body weight increases the demands on the kneecap joint.

However, not every case of stair pain is caused by the kneecap.

Persistent pain when climbing stairs can also be associated with:

• Knee osteoarthritis
• Meniscus problems
• Cartilage changes
• Tendon problems
• Previous injury
• Weakness or reduced capacity of the thigh and hip muscles
• Other knee conditions

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

Why Does My Knee Hurt When Climbing Stairs?

Climbing stairs requires your knee to bend while the muscles in your leg lift your body upward.

The quadriceps muscles at the front of the thigh work hard during this movement.

At the same time, forces through the joint between the kneecap and thigh bone increase.

If the knee is currently sensitive to load, stairs can therefore reproduce pain even when walking on flat ground is relatively comfortable.

This is why some people say:

“I can walk quite far, but climbing stairs hurts almost immediately.”

The pattern is useful, but it does not identify one diagnosis by itself.

Is Patellofemoral Pain a Common Cause?

Yes.

Patellofemoral pain commonly causes discomfort:

• Around the kneecap
• Behind the kneecap
• At the front of the knee

Typical aggravating activities include:

• Climbing stairs
• Going downstairs
• Squatting
• Running
• Jumping
• Sitting for a long time with the knee bent

Mayo Clinic and NHS musculoskeletal guidance both identify stairs as a common trigger for patellofemoral pain.

The condition is sometimes called:

• Anterior knee pain
• Runner’s knee
• Kneecap pain

It can occur in active people, but you do not need to be a runner to develop it.

Where Is Patellofemoral Pain Usually Felt?

People often describe pain:

• Directly behind the kneecap
• Around the edges of the kneecap
• At the front of the knee
• Deep inside the front of the joint

The pain may feel:

• Aching
• Dull
• Sharp under heavier load
• Worse after sitting for a long period
• Worse during stairs or squatting

Clicking or popping may also occur.

Cleveland Clinic notes that patellofemoral pain often produces aching around or under the kneecap and can become sharper during stairs, running, jumping or squatting.

Does Knee Pain on Stairs Mean My Cartilage Is Damaged?

Not necessarily.

Cartilage problems are one possible explanation, but symptoms on stairs do not prove cartilage damage.

Stair pain can occur with:

• Patellofemoral pain without major structural damage
• Osteoarthritis
• Meniscus problems
• Tendon problems
• Changes in muscle capacity
• Several factors at the same time

MRI may demonstrate cartilage changes, but even when abnormalities are found, they need to be interpreted together with your symptoms.

Could It Be Knee Osteoarthritis?

Yes.

Knee osteoarthritis can cause:

• Pain with activity
• Stiffness
• Pain on stairs
• Swelling
• Grinding or creaking
• Reduced movement

It becomes more common with age, but age alone does not determine whether someone has significant symptoms.

For many people over 45 with typical activity-related knee pain and short-lived morning stiffness, osteoarthritis can often be diagnosed clinically without immediate scanning.

An X-ray may be useful when imaging is required.

Could a Meniscus Problem Cause Pain When Climbing Stairs?

Possibly.

The menisci are cartilage structures inside the knee that help distribute load.

Meniscus-related symptoms can include:

• Inner or outer joint-line pain
• Pain with twisting
• Pain during deeper knee bending
• Swelling
• Catching
• Locking

A traumatic meniscus injury often follows a twisting incident, although degenerative meniscus changes are common in adults and do not always cause symptoms.

MRI can provide detailed images of the meniscus when it is clinically appropriate to investigate it further.

What if the Pain Is Directly at the Kneecap?

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

This type of pain is often aggravated by:

• Stairs
• Squatting
• Getting up from a low chair
• Running
• Prolonged sitting

The kneecap moves within a groove in the thigh bone as the knee bends and straightens.

Activities that require the knee to bend under load increase demand through this joint.

What if My Knee Hurts Above the Kneecap?

Pain above the kneecap can potentially involve structures such as:

• Quadriceps tendon
• Muscles
• Patellofemoral region
• Other nearby tissues

The precise location and movements that reproduce pain help guide the examination.

What if My Knee Hurts Below the Kneecap?

Pain below the kneecap can sometimes involve:

• Patellar tendon
• Fat pad
• Other structures around the front of the knee

The age of the patient, activity level and exact pain location can help distinguish between different causes.

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

Inner-side knee pain may involve structures such as:

• Medial meniscus
• Medial collateral ligament
• Tendons
• Joint surfaces
• Osteoarthritis

The fact that stairs reproduce the pain does not necessarily mean the problem is in the kneecap.

What if the Pain Is on the Outer Side?

Possible structures can include:

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

The location provides useful information but is not enough by itself to diagnose the problem.

Why Does My Knee Hurt Climbing Stairs but Not Walking?

Walking on flat ground usually requires less knee bending and places different demands on the thigh muscles and knee joint.

Climbing stairs requires:

• Greater knee flexion
• More quadriceps work
• Greater joint loading

A knee that tolerates ordinary walking may therefore become painful under the greater demands of stair climbing.

Why Does My Knee Hurt Going Upstairs but Not Downstairs?

Some people notice pain mainly while ascending, while others have more pain while descending.

Both activities increase load through the knee, but the muscular demands are slightly different.

The difference can sometimes help during clinical assessment, but it does not reliably identify one structure by itself.

Patellofemoral pain can occur during both stair ascent and descent.

My Knee Hurts When Climbing Stairs but There Is No Swelling. Is That Serious?

Not necessarily.

Many knee conditions cause pain without obvious swelling.

The absence of swelling does not rule out:

• Patellofemoral pain
• Meniscus problems
• Tendon problems
• Cartilage changes
• Other musculoskeletal causes

More important questions include:

• How long has the pain lasted?
• Is it worsening?
• Is there locking?
• Is the knee unstable?
• Was there an injury?
• Is your walking affected?
• Has treatment helped?

My Knee Clicks When I Climb Stairs. Should I Worry?

Clicking or popping alone does not necessarily indicate serious damage.

It can occur with patellofemoral pain and can also occur in otherwise healthy knees.

Cleveland Clinic notes that cracking or popping can accompany patellofemoral pain.

More concerning symptoms include:

• True locking
• Repeated instability
• Significant swelling
• Severe pain
• Recent trauma

My Knee Feels Weak Going Upstairs. Why?

Climbing stairs places substantial demand on the quadriceps and hip muscles.

Weakness may therefore become noticeable during stairs before it is obvious during ordinary walking.

Possible reasons can include:

• Pain inhibiting normal muscle function
• Reduced quadriceps strength
• Reduced hip strength
• Recent inactivity
• Previous injury
• Neurological problems in some cases

If weakness is new, significant or progressively worsening, medical assessment is appropriate.

Will Strengthening My Quadriceps Help?

Often, depending on the diagnosis.

Exercise-based rehabilitation is commonly used for patellofemoral pain.

NHS guidance notes that weakness or reduced function of the hip and thigh muscles can contribute to symptoms and recommends structured exercise as part of management.

However, simply prescribing more squats or stair exercises to someone whose knee hurts badly during those movements may not be ideal.

The programme may need to begin with more tolerable exercises and progress as the knee adapts.

What if Exercise Makes the Pain Worse?

Some temporary discomfort can occur during rehabilitation.

But persistent deterioration should prompt reassessment.

Useful questions include:

• Is the exercise load too high?
• Is the volume excessive?
• Is the diagnosis correct?
• Is another structure involved?
• Does the programme need to be modified?

If the same exercises have been repeated for weeks or months without meaningful improvement, it may be more useful to reassess the problem than simply increase the intensity again.

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

Not improving with physiotherapy does not necessarily mean physiotherapy was the wrong treatment.

But it may mean the problem deserves another look.

Questions worth considering include:

• Has the diagnosis been reassessed?
• Has there been any improvement at all?
• Is the treatment programme matched to the suspected condition?
• Are symptoms now different from when treatment started?
• Is there locking, instability or swelling?
• Would imaging provide information that could change management?

Sometimes a revised rehabilitation programme is appropriate.

Sometimes further investigation is useful.

Do I Need an X-Ray?

Not automatically.

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

• Osteoarthritis
• Fractures
• Bone alignment
• Other bone abnormalities

For some adults with suspected osteoarthritis, X-ray can be a useful first imaging test.

Do I Need an MRI?

Most people with uncomplicated knee pain on stairs do not need immediate MRI.

MRI may become more useful when:

• Pain is persistent
• Treatment has not worked as expected
• The diagnosis remains uncertain
• The knee locks
• Instability is present
• There is recurrent swelling
• Significant injury occurred
• A meniscus, ligament or cartilage problem is suspected

Mayo Clinic notes that MRI can provide detailed images of both bone and soft tissues such as ligaments and cartilage when imaging is needed for patellofemoral-type symptoms.

What Can a Knee MRI Show?

Depending on the clinical question, MRI can provide information about:

• Meniscus
• ACL and PCL
• Collateral ligaments
• Cartilage
• Tendons
• Bone marrow
• Joint structures

It can therefore help when a doctor needs more information than an X-ray can provide.

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

Eligible patients may potentially use up to S$600 per year from MediSave for qualifying outpatient diagnostic scans, subject to prevailing rules and their remaining annual limit.

How Quickly Can I Get a Knee MRI?

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

Within one working day

subject to:

• MRI safety screening
• Appointment availability
• Appropriate imaging protocol

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

Does MRI Use Radiation?

No.

MRI uses a strong magnetic field and radiofrequency energy rather than ionising radiation.

Does Knee Pain When Climbing Stairs Mean I Need Surgery?

No.

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

Depending on the diagnosis, treatment may involve:

• Activity modification
• Physiotherapy
• Progressive strengthening
• Load management
• Medication where appropriate
• Other non-surgical treatments
• Injections in selected cases
• Surgery where genuinely indicated

The appropriate approach depends on the underlying problem and severity.

When Should I Seek Medical Attention?

Arrange an assessment if:

• Pain has persisted for several weeks
• Symptoms are getting worse
• Walking is becoming difficult
• The knee repeatedly gives way
• The knee locks
• Swelling keeps returning
• Treatment is not helping
• You are unsure what is causing the pain

Seek urgent medical attention if:

• There has been major trauma
• You cannot bear weight
• The knee is badly deformed
• Severe swelling develops rapidly
• The knee becomes hot and red and you feel unwell
• There are other signs of a medical emergency

Frequently Asked Questions About Knee Pain When Climbing Stairs

Why does my knee hurt when climbing stairs?

One common reason is patellofemoral pain around or behind the kneecap. Other possibilities include osteoarthritis, meniscus problems, cartilage changes and tendon-related problems.

Why does climbing stairs hurt more than walking?

Stairs require greater knee bending and more work from the thigh muscles, increasing load through the knee.

Is pain under the kneecap on stairs patellofemoral pain?

It may be. Pain around or behind the kneecap that worsens during stairs, squatting or prolonged sitting is typical of patellofemoral pain.

Does stair pain mean cartilage damage?

No. Cartilage changes are one possibility, but symptoms alone cannot determine whether cartilage is damaged.

Can a meniscus tear hurt when climbing stairs?

Yes, although meniscus problems often have other features such as joint-line pain, catching, locking, swelling or pain with twisting.

Should I strengthen my knees?

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

When should I consider an MRI?

MRI may be useful when symptoms are persistent, treatment has not worked as expected, the diagnosis remains uncertain, or a structural problem is 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 Every Time You Climb Stairs?

If stair pain has persisted despite rest, exercises, medication or physiotherapy, it may be useful to reassess the diagnosis rather than simply keep repeating the same treatment.

At The Pain Relief Clinic, we can assess:

• Where the pain may be coming from
• Whether the current diagnosis still fits
• Whether further imaging may be useful
• Whether rehabilitation needs to change
• Which non-surgical treatment options may be appropriate

When MRI is medically indicated, imaging can often be arranged within one working day.

Knee pain assessment 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 diagnostic scans
• 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 hurting when climbing stairs for weeks or months despite treatment, contact us for an assessment of whether a different approach or further investigation may be appropriate.

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References

1. Mayo Clinic — Patellofemoral Pain Syndrome: Symptoms and Causes.
2. Mayo Clinic — Patellofemoral Pain Syndrome: Diagnosis and Treatment.
3. Cleveland Clinic — Patellofemoral Pain Syndrome, medically reviewed April 2026.
4. NHS Dynamic Health — Patellofemoral Knee Pain.
5. Central London Community Healthcare NHS Trust — Knee Pain and Patellofemoral Pain.

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Important Medical Information

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

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

MRI is not required for every case of knee pain. The appropriate investigation depends on the history, 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 it 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