Medial Knee Pain (Inside)

Medial knee pain

Here we explain the causes of pain on the inside of the knee including ligament sprains and cartilage meniscus injuries. Medial knee pain is usually a result of sudden trauma, but can also develop gradually through overuse.


Select the type of medial knee pain. Click on headings to expand:

Acute knee injuries (sudden onset)

Acute knee pain is usually sudden onset and includes sprains, strains & fractures:

Medial knee ligament sprain

An MCL sprain is a tear to the ligament on the inside of the knee joint. It is caused either by a direct impact to the outside of the knee or from twisting. Symptoms include:

  • Sudden onset pain located on the inside of the knee.
  • Rapid swelling.
  • Medial knee ligament injuries are graded from one to three depending on the severity.
  • Often they will occur in conjunction with a medial cartilage meniscus injury.

Medial meniscus injury

A torn meniscus is a tear of the semi-circular cartilage in the knee joint. It is commonly injured through direct impact in contact sports or twisting, but can also occur in older athletes through gradual degeneration. Symptoms include:

  • Pain on the inside of the knee which may be of sudden onset but can also occur gradually.
  • The patient will usually experience pain when fully bending the knee or squatting down.
  • There may be swelling present but not always.
  • The patient may also complain of the knee locking or giving way.
  • There will be tenderness along the joint line.

Gradual onset medial knee pain

Gradual onset or chronic knee pain develops over time, often through overuse or wear and tear. But it can also develop following an acute injury which fails to heal properly.

Patellofemoral pain

Patellofemoral Pain Syndrome (PFPS) is a generic term used to describe pain at the front of the knee around the patella (kneecap). Symptoms include

  • An aching pain in the knee joint, particularly at the front of the knee around and under the patella.
  • There is often tenderness along the inside border of the kneecap.
  • Swelling will sometimes occur after exercise.
  • Patellofemoral pain is often worse when walking up and down hills or sitting for long periods of time.

Synovial plica

A synovial plica is a fold in the synovial membrane which encloses the knee joint. The plica is found along the inside of the kneecap. It is sometimes confused with, or misdiagnosed as patellofemoral pain syndrome as the symptoms can be similar:

  • Pain and discomfort on the inside of the knee.
  • A sharp pain at the front inside edge of the kneecap.
  • Symptoms may also occur towards the back of the patella.
  • You will likely feel a sharp pain when squatting.
  • A synovial plica may sometimes feel like a thickened band under the inside of the kneecap.

Pes anserine bursitis/tendinopathy

This is one of the less common causes of pain on the inside of the knee. The pes anserine is the point on the inside of the knee where the tendons of three muscles combine and insert.

  • The bursa which lies under the tendon can become inflamed through overuse.
  • The tendon may also become inflamed, or more likely degenerate if your injury is chronic.
  • Pes Anserine Tendonitis is often difficult to distinguish from a medial ligament injury. This is because the symptoms are similar and both are likely to be painful when stressing the inside of the knee.

Osteoarthritis of the knee

Osteoarthritis is a common cause of knee pain and usually affects people over fifty years old. It occurs when cartilage which protects the bones degenerates.

  • Pain develops gradually over time and often causes stiffness and sometimes swelling.
  • Symptoms start as a deep aching pain in the inner knee which is worse after exercise.
  • Stiffness in the joint is common, particularly in the morning, however, this may reduce with movement as the joint produces lubricating synovial fluid.
  • Sometimes a clicking or cracking noises are heard when moving the knee.

Referred knee pain

Pain on the inside of the knee can result from injuries or conditions elsewhere, especially, in the hip and lower back. The sciatic nerve gets pinched or compressed radiating pain down the leg.

Other causes of medial knee pain

Other causes of medial knee pain in young athletes include:

Not sure what is causing medial knee pain?

Try our sports injury symptom checker. Simply select the symptoms which apply to you to view relevant injuries and conditions.

Rehabilitation & exercises

We have the following rehab programs available on our injury rehabilitation app:

ACL Sprain

Full rehabilitation program

A full step-by-step criteria-based rehab program for ACL sprain or anterior cruciate ligament sprain. Created by England Rugby Team Consultant Physio Phil Pask.

MCL Sprain

Full rehabilitation program

A full step-by-step criteria-based rehab & strengthening program for Medial knee ligament sprain. Created by England Rugby Team Consultant Physio Phil Pask.

VMO Knee Strengthening

Full rehabilitation program

A full step-by-step criteria-based strengthening program targeting the Vastus medialis oblique muscle. Created by elite -evel football Physio Paul Tanner.

Knee Taping

Video tutorials

Simple sports taping techniques for a variety of knee injuries as demonstrated by Senior sports physiotherapist Neal Reynolds

Download the

Sports Injury Rehabilitation App

Our step by step rehabilitation programs take you from initial injury to full fitness.

Recommended products

We recommend the following products to help treat knee ligament injuries

Cold wrap

Cold compresion wrap

A cold therapy and compression wrap is essential first aid. It reduces pain and swelling and can also be used to apply heat later in the rehabilitation program.

Resistance bands

Resistance bands

Resistance bands are important for most sports rehabilitation and enable you to exercise any muscle from the comfort of your own home.

Foam roller

A foam roller is an excellent piece of kit which can be used in place of massage to treat calf injuries. They are also excellent when use regularly as part of your warm up to help prevent future injury and improve performance.

Hinged knee brace

Hinged knee brace

A hinged knee brace protects the joint and helps reduce any swelling. It has solid metal supports down the sides to prevent sideways movement of the joint. Grade 2 or 3 injuries may require a limited motion hinged knee brace.

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