Pain on the inner side of the knee — sometimes called medial knee pain — can come from several different structures.

People often describe:

• A sharp pain on the inside of the knee
• Pain along the inner joint line
• Pain when walking
• Pain when climbing stairs
• Pain when bending or straightening
• Pain after twisting
• Pain without obvious swelling
• Tenderness when pressing the inner side of the knee

Possible causes include:

• Medial meniscus problems
• Medial collateral ligament, or MCL, injury
• Knee osteoarthritis
• Tendon or bursa irritation
• Other joint or soft-tissue problems

The exact location of the pain is useful, but inner-side pain alone does not tell you the diagnosis.

A proper assessment considers how the pain started, which movements reproduce it, whether the knee locks or gives way, and whether treatment has helped.

What Structures Are on the Inner Side of the Knee?

Several important structures are located around the medial side of the knee.

These include:

• Medial meniscus
• Medial collateral ligament
• Medial joint cartilage
• Tendons
• Bursa and surrounding soft tissues

Because these structures are close together, different conditions can produce pain in a very similar location.

Could Inner Knee Pain Be a Meniscus Problem?

Yes.

The medial meniscus is one of two C-shaped cartilage structures inside the knee.

It helps distribute load between the thigh bone and shin bone.

A meniscus injury may occur after:

• Twisting
• Pivoting
• Deep bending
• Sudden changes of direction

However, meniscus changes can also develop gradually with age without one obvious injury.

Mayo Clinic notes that meniscus tears can cause pain, stiffness, swelling, difficulty fully straightening the knee, locking or a feeling that the knee may give way.

What Does Meniscus Pain Feel Like?

Meniscus-related pain may be felt:

• Along the inner joint line
• Deep inside the knee
• Sometimes toward the back of the knee

Symptoms may become worse with:

• Twisting
• Turning
• Squatting
• Deep knee bending
• Rising from a chair
• Climbing stairs

A meniscus problem may also cause:

• Catching
• Locking
• Swelling
• A feeling of instability

However, not every person with medial knee pain has a meniscus tear.

Can a Meniscus Tear Happen Without a Major Injury?

Yes.

In younger people, meniscus tears are often associated with twisting injuries.

In older adults, degenerative changes can make the meniscus more vulnerable, so symptoms may develop after a relatively minor movement or without a memorable injury.

Mayo Clinic notes that age-related degeneration can contribute to meniscus tears even with little or no trauma.

Could Inner Knee Pain Be an MCL Injury?

Yes.

The medial collateral ligament runs along the inner side of the knee and helps stabilise the joint.

An MCL injury often occurs when force pushes the knee inward from the outside.

Symptoms can include:

• Pain along the inner side of the knee
• Tenderness over the ligament
• Swelling
• A feeling of instability in more significant injuries

A clear injury mechanism makes an MCL problem more likely.

If your knee pain developed gradually without trauma, other explanations may be more likely.

Could It Be Knee Osteoarthritis?

Yes.

Osteoarthritis commonly affects the inner compartment of the knee.

Possible symptoms include:

• Activity-related pain
• Stiffness
• Pain on stairs
• Pain after prolonged walking
• Reduced movement
• Grinding or creaking
• Swelling in some cases

X-rays are often useful when osteoarthritis is suspected because they can show:

• Joint-space narrowing
• Bone changes
• Alignment
• Other degenerative changes

MRI is not automatically necessary for typical osteoarthritis.

What if My Inner Knee Hurts but There Is No Swelling?

This is common.

The absence of swelling does not rule out:

• Meniscus problems
• Osteoarthritis
• Tendon irritation
• MCL-related pain
• Other musculoskeletal conditions

Some knee problems produce significant pain without obvious swelling.

More useful clues include:

• Whether there was an injury
• Whether twisting hurts
• Whether the knee locks
• Whether it gives way
• Whether stairs reproduce the pain
• How long the symptoms have lasted

Inner Knee Pain When Walking

Pain while walking can arise from several causes.

The pattern can be helpful.

For example:

Pain at the Start of Walking

This may occur with stiffness or degenerative joint conditions.

Pain After Longer Distances

This may suggest that the knee is struggling with repeated loading.

Sharp Pain During Turning

This may raise greater suspicion of a meniscus or other internal joint problem.

The pattern alone is not enough to confirm the diagnosis.

Inner Knee Pain When Going Up or Down Stairs

Stairs increase the demands on the knee.

Medial knee pain on stairs can potentially relate to:

• Osteoarthritis
• Meniscus
• Cartilage
• Tendons
• Patellofemoral joint
• Other structures

If stairs are the only trigger, the problem may still be relatively early or load-dependent.

Persistent stair pain deserves assessment if it is not improving.

Inner Knee Pain When Bending

Pain with deeper bending can occur with:

• Meniscus problems
• Osteoarthritis
• Cartilage irritation
• Tendon problems
• Other internal joint conditions

If bending also produces catching or locking, a meniscus problem becomes more important to consider.

Inner Knee Pain When Straightening

Pain when fully straightening the knee may arise from:

• Meniscus
• Joint irritation
• Swelling
• Cartilage
• Other structures

Difficulty achieving full extension after injury can sometimes occur with a meniscus problem.

Mayo Clinic lists difficulty straightening the knee and locking among possible symptoms of a torn meniscus.

Inner Knee Pain After Running

Running places repeated load through the knee.

Possible explanations include:

• Overload
• Tendon irritation
• Meniscus problems
• Patellofemoral pain
• Early degenerative changes
• Training error

A recent increase in:

• Running distance
• Speed
• Hills
• Frequency

may be relevant.

If pain disappears quickly with reduced loading and does not recur, imaging may not be necessary.

Persistent or worsening pain deserves further assessment.

Inner Knee Pain After Squatting

Deep squatting increases bending and load inside the knee.

Pain may occur with:

• Meniscus problems
• Cartilage changes
• Osteoarthritis
• Patellofemoral pain
• Tendon problems

If deep squatting repeatedly produces sharp medial joint-line pain, a clinical assessment may help determine whether the meniscus is involved.

Can Tendons Cause Inner Knee Pain?

Yes.

Tendons on the inner side of the knee can become painful from:

• Repetitive loading
• Increased activity
• Weakness
• Changes in exercise
• Reduced tissue tolerance

Tendon-related pain may be more localised and tender to touch than pain arising from deeper inside the joint.

What Is Pes Anserine Pain?

The pes anserine region is located on the inner side of the upper shin, slightly below the knee joint.

Pain in this area can sometimes be related to irritation of tendons or a nearby bursa.

This may produce:

• Inner knee pain
• Tenderness below the joint line
• Pain with activity
• Pain on stairs

Its location is usually slightly lower than typical medial meniscus joint-line pain.

Can Hip Problems Cause Inner Knee Pain?

Occasionally.

Pain can sometimes be referred from elsewhere.

Mayo Clinic notes that knee pain can arise from problems within the knee or from other areas such as the hip.

This is one reason the examination should not focus only on the exact point where pain is felt.

Do I Need an X-Ray?

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

• Osteoarthritis
• Bone alignment
• Fracture
• Other bone abnormalities

X-rays provide excellent views of bone but less information about meniscus, tendons and many other soft tissues.

Do I Need an MRI?

Not everyone with inner knee pain needs MRI.

MRI may become useful when:

• Pain persists despite treatment
• The diagnosis remains uncertain
• A meniscus problem is suspected
• There is locking or catching
• The knee gives way
• There was significant injury
• Symptoms continue despite a normal or non-explanatory X-ray
• Imaging could change treatment

MRI can provide detailed images of:

• Meniscus
• Cartilage
• Ligaments
• Tendons
• Muscles
• Bone marrow
• Other knee structures

Can MRI Show a Medial Meniscus Tear?

Yes.

Knee MRI is commonly used to assess meniscus injuries.

RadiologyInfo identifies damaged meniscus, cartilage, ligaments and tendons among the common reasons for knee MRI.

However:

Finding a meniscus tear does not automatically mean surgery is required.

Some meniscus problems can improve with conservative treatment.

The significance of an MRI finding depends on:

• Symptoms
• Tear type
• Age
• Activity requirements
• Locking
• Other knee abnormalities

Can MRI Show an MCL Injury?

Yes.

MRI can provide detailed images of knee ligaments, including the MCL.

However, many MCL injuries can also be identified clinically from the injury history and examination.

MRI may be more useful when the diagnosis is uncertain or associated injuries are suspected.

MRI or Ultrasound for Inner Knee Pain?

It depends on what needs to be assessed.

Ultrasound can be useful for some superficial soft-tissue problems such as:

• Tendons
• Fluid collections
• Certain bursae

MRI provides a more comprehensive view of structures deeper inside the knee, including:

• Meniscus
• Ligaments
• Cartilage
• Bone marrow

The best investigation depends on the suspected cause.

My X-Ray Was Normal but My Inner Knee Still Hurts. What Next?

A normal X-ray does not exclude every cause of medial knee pain.

X-rays provide limited information about structures such as the meniscus and ligaments.

If symptoms remain significant, the next step may be to reconsider:

• The diagnosis
• Whether MRI is appropriate
• Whether ultrasound would help
• Whether treatment needs to change

Persistent symptoms deserve reassessment rather than assuming nothing is wrong because the X-ray was normal.

I’ve Tried Physiotherapy but My Inner Knee Still Hurts. What Next?

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

However, persistent symptoms may justify asking:

• Was the original diagnosis correct?
• Has the problem changed?
• Is the exercise programme appropriate?
• Is a meniscus or other internal structure involved?
• Would imaging alter treatment?

Sometimes rehabilitation should continue.

Sometimes the programme needs to change.

Sometimes further investigation is useful.

Does a Meniscus Tear Always Require Surgery?

No.

Many meniscus problems can initially be treated without surgery.

Mayo Clinic notes that conservative treatment such as rest, medication and physical therapy can be sufficient in some cases, while surgery may be considered when symptoms remain problematic or the knee locks.

The decision depends on the individual situation.

Can Inner Knee Pain Improve Without Surgery?

Yes.

Many causes of medial knee pain can be managed without surgery.

Depending on the diagnosis, treatment may involve:

• Activity modification
• Physiotherapy
• Progressive strengthening
• Load management
• Medication where appropriate
• Other non-surgical treatment
• Injections in selected cases

Surgery is generally reserved for selected problems where it is genuinely appropriate.

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 remaining limits.

How Quickly Can I Get a Knee MRI?

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

Within one working day

subject to:

• MRI safety screening
• Correct imaging protocol
• Appointment availability

Does Knee MRI Use Radiation?

No.

MRI does not use ionising radiation.

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

When Should Inner Knee Pain Be Checked Urgently?

Seek urgent medical care if:

• There has been major trauma
• The knee is visibly deformed
• You cannot bear weight
• Severe swelling develops rapidly
• The knee becomes hot and red and you feel unwell
• You cannot move the knee normally
• Severe pain follows a significant injury

Mayo Clinic advises urgent evaluation for symptoms such as inability to bear weight, major swelling, deformity or intense pain after injury.

Frequently Asked Questions About Inner-Side Knee Pain

What causes pain on the inside of the knee?

Common possibilities include medial meniscus problems, MCL injury, osteoarthritis, tendon or bursa irritation and other joint conditions.

Can a meniscus tear cause inner knee pain?

Yes. The medial meniscus lies along the inside of the knee, and meniscus injury commonly causes joint-line pain, especially during twisting or bending.

Can I have a meniscus tear without swelling?

Yes. Swelling is common but not always present, particularly with smaller or degenerative meniscus problems.

Why does my inner knee hurt when I walk?

Walking repeatedly loads the medial side of the knee. Meniscus, arthritis, tendon and other problems may become painful under this load.

Why does my inner knee hurt on stairs?

Stairs increase knee bending and loading, which can aggravate several medial knee conditions.

Do I need an MRI for inner knee pain?

Not necessarily. MRI may become more useful when symptoms persist, the diagnosis is unclear, the knee locks or gives way, or a meniscus or ligament 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.

Can MediSave be used?

Eligible outpatient diagnostic scans may qualify for up to S$600 per patient per year from MediSave, subject to prevailing rules and remaining limits.

Inner Knee Pain Not Improving?

If pain on the inner side of your knee has continued despite rest, medication, exercises or physiotherapy, it may be useful to reassess what is actually causing the symptoms.

At The Pain Relief Clinic, we can assess:

• Whether the pain is more likely to arise from the meniscus, ligament, joint or surrounding tissues
• Whether your current diagnosis still fits
• Whether X-ray, MRI or another investigation may be useful
• Whether rehabilitation needs to change
• Which non-surgical treatment options may be appropriate

When MRI is medically indicated, a knee MRI 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 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 inner-side knee pain has persisted 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. Mayo Clinic — Torn Meniscus: Symptoms and Causes.
3. Mayo Clinic — Torn Meniscus: Diagnosis and Treatment.
4. Mayo Clinic — Knee Pain: Causes and When to Seek Medical Attention.
5. RadiologyInfo.org — Bone X-Ray.

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Important Medical Information

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

Inner-side knee pain can arise from several different conditions. Symptoms alone cannot determine whether the problem involves the medial meniscus, MCL, cartilage, osteoarthritis, tendons, bursa or another structure.

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