Orthopaedic Innovation

Knee tendon and ligament injury

Proven, trusted Orthopaedic surgery to get you back to living your life sooner

What is a knee tendon or ligament injury?

Tendons and ligaments are strong tissues that connect muscles and bones, helping to stabilise and move the knee joint.

Injuries to these structures can cause pain, swelling, and instability, making it difficult to walk or bend the knee properly.

Knee tendon and ligament injuries are common in sports and activities that involve sudden stops, jumps, or changes in direction.

They can range from mild sprains (overstretching) to complete tears that may require surgery.

Types of knee tendon & ligament injuries

Anterior cruciate ligament (ACL) tear

A common sports injury that affects stability in the knee.

Posterior cruciate ligament (PCL) tear

Usually caused by a direct impact to the knee, such as in car accidents or falls.

Medial collateral ligament (MCL) & lateral collateral ligament (LCL) tears

These ligaments on the inner and outer sides of the knee help control side-to-side movement.

Patellar tendonitis ("jumper’s knee")

Inflammation (swelling) of the patellar tendon, which connects the kneecap to the shinbone.

Quadriceps tendonitis

Inflammation of the quadriceps tendon, which connects the thigh muscles to the kneecap, often caused by overuse or repetitive strain.

Patellar tendon rupture

A complete tear of the patellar tendon, making it impossible to straighten the knee. This often requires surgery.

Iliotibial band syndrome (ITBS)

Irritation of the iliotibial band (a thick tissue running down the outside of the thigh), causing pain on the outer side of the knee, especially in runners.

Meniscus tear

A tear in the meniscus (the cartilage that cushions the knee joint), often caused by twisting motions or sudden stops.

What causes knee tendon & ligament injuries?

Sudden twisting or pivoting movements

Common in sports like football, basketball, and skiing.

Direct impact

A hard hit to the knee, such as in a tackle or fall.

Overuse and/or repetitive stress

Jumping, running, or excessive bending of the knee over time.

Weak or tight muscles

Poor flexibility or muscle imbalance can put extra strain on tendons and ligaments.

Common symptoms of a knee tendon or ligament injury

Pain

Can be sudden and severe or develop gradually with overuse.

Instability or weakness

A feeling that the knee might "give way" when walking or standing.

Swelling and bruising

The knee may become swollen and tender to touch.

Popping or clicking sound

A loud "pop" at the time of injury (common with ACL tears).

Difficulty moving the knee

Stiffness or trouble bending and straightening the leg.

How is a Knee Tendon or Ligament Injury Diagnosed?

A doctor or specialist may diagnose the injury using:

Physical examination

Checking knee stability, movement, and pain levels.

X-rays

To rule out fractures (broken bones).

MRI or Ultrasound scans

To assess damage to tendons, ligaments, and soft tissues.

Treatment Options for Knee Tendon & Ligament Injuries

Non-surgical treatments (no surgery needed)

For mild to moderate injuries, treatment usually includes:

Rest & activity modification

Reducing high-impact activities to allow healing.

Physiotherapy (rehabilitation exercises)

Strengthening and stretching exercises to improve flexibility, support the knee, and restore movement.

Ice & compression

Applying ice packs and using compression wraps to reduce swelling and pain.

Bracing and support 

Knee braces help stabilise the joint and prevent further injury.

Pain relief medication

Paracetamol or anti-inflammatory medicines (e.g. ibuprofen) to reduce swelling and discomfort.

Corticosteroid or PRP injections

Used for chronic cases of patellar tendonitis, quadriceps tendonitis, and ITBS to reduce inflammation and promote healing.

Surgical treatments (when surgery is needed)

If the injury is severe, surgery may be required to repair or reconstruct the damaged tendon or ligament:

ACL & PCL reconstruction

Uses a graft (replacement tissue) to rebuild the ligament.

MCL & LCL repair

If the ligament is completely torn, surgical stitching or reconstruction may be needed.

Patellar tendon or quadriceps tendon repair

If the tendon is completely ruptured, surgery is required to reattach it to the kneecap and restore function.

Meniscus repair or meniscectomy

Depending on the severity of a meniscus tear, the torn portion may be repaired or removed to restore knee function.

Iliotibial band release surgery

In rare cases, surgery is performed for ITBS if non-surgical treatments fail.

Arthroscopic debridement

A minimally invasive procedure to remove damaged tissue in cases of chronic tendonitis or cartilage damage.

Recovery & Rehabilitation

Mild injuries (e.g. tendonitis, ITBS, minor sprains)

Recovery may take a few weeks with rest and physiotherapy.

Moderate injuries (e.g. partial ligament tears, meniscus tears)

A knee brace and physiotherapy may be needed for several months.

Severe injuries (e.g. complete tendon ruptures, ACL tears, surgical cases)

Full recovery can take 6-12 months, depending on the procedure, with rehabilitation exercises to restore knee strength and function.

When should you see a specialist?

If your knee pain is severe, the joint feels unstable, or you are unable to put weight on your leg, it’s important to see a specialist.

Early diagnosis and treatment can help prevent long-term problems and speed up recovery.

Meet your knee specialists

At Orthopaedic Innovation, our world leading surgical team offers a range of treatment options for people experiencing knee tendon and ligament injuries.
Locations

The Harley Street Hospital,
19 Harley Street,
London, W1G 9QJ
The Cromwell Hospital,
164-178 Cromwell Road,
London SW5 0TU
The London Independent Hospital,
1 Beaumont Square,
London E1 4NL
Medical disclaimer
The information provided on this website is for informational purposes only and should not be considered medical advice. It is not intended to replace consultation with a qualified healthcare professional. While we strive to provide accurate and up-to-date information, medical knowledge is constantly evolving, and individual cases may vary. Any surgical or non-surgical treatments discussed on this website should be considered in consultation with a medical professional who can assess your individual needs and medical history.
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