Lateral Collateral Ligament (LCL)

What is the Condition?

The lateral collateral ligament (LCL) is one of the four main ligaments in the knee. It runs along the outer side of the knee and helps stop the joint from bending outward too much. It plays an important role in keeping the knee stable during walking, running, turning, and sport.

An LCL injury usually happens when force is applied to the inner side of the knee, pushing the knee outward and overstretching the ligament.

LCL injuries are often graded as:

• Grade 1 – mild stretch or small tear
• Grade 2 – partial tear
• Grade 3 – complete tear

Mild and moderate LCL injuries are often treated without surgery. Severe tears, especially those causing instability or happening with other ligament injuries, may need LCL surgery to restore normal knee function.

Many people search for this as:

• torn LCL
• LCL tear
• lateral collateral ligament injury
• outer knee ligament injury
• LCL reconstruction surgery
• LCL rehab

Causes

An LCL injury usually happens when the knee is forced outward suddenly.

Common causes include:

• direct blow to the inner side of the knee
• contact sports injuries
• twisting injuries
• awkward landings
• knee dislocation
• road traffic accidents
• multi-ligament knee injuries
• sports such as football, rugby, skiing, or basketball

Severe LCL injuries may occur together with:

• PCL injuries
• ACL injuries
• posterolateral corner injuries
• knee dislocation injuries
• other major ligament damage

When the injury is severe, surgery may be recommended to repair the torn ligament or reconstruct it using a graft.

Symptoms

Before surgery, severe LCL injuries may cause:

• pain on the outer side of the knee
• swelling
• knee instability
• difficulty walking
• stiffness
• reduced range of movement
• weakness
• pain when turning or pivoting
• the knee feeling like it may give way

After surgery, it is normal to have:

• pain around the ligament and incision site
• swelling
• stiffness
• reduced knee movement
• difficulty walking in the early stage
• temporary need for crutches and a knee brace

What Should I Do?

If you have been advised to have LCL surgery, pre-operative physiotherapy can help prepare your body for recovery.

Before surgery, you should:

• follow your surgeon’s advice
• begin physiotherapy if recommended
• reduce swelling
• improve knee movement where possible
• strengthen the muscles around the knee
• strengthen the hip, ankle, and opposite leg
• prepare for walking with crutches if needed

After surgery, you should:

• use your brace and crutches exactly as advised
• follow weight-bearing instructions carefully
• attend physiotherapy regularly
• continue your home exercise programme
• progress gradually rather than trying to do too much too early

Early guided rehabilitation helps improve recovery and reduce complications.

Physiotherapy Treatment

Physiotherapy is essential before and after LCL repair or LCL reconstruction surgery.

Physiotherapy before LCL surgery

Pre-surgery physiotherapy helps improve your recovery after the operation. It may include:

• swelling reduction
• pain management
• knee range of motion work
• quadriceps strengthening
• hip strengthening
• ankle strengthening
• gait advice
• preparation for post-op mobility

Better strength and movement before surgery often support smoother rehabilitation afterward.

Physiotherapy after LCL surgery

Early stages of rehabilitation

In the early phase, the focus is on protecting the repaired ligament and controlling post-surgical symptoms. Treatment may include:

• gentle range of motion exercises
• pain and swelling management
• partial weight-bearing progression
• strengthening exercises for the hip, ankle, and opposite leg
• circulatory exercises
• flexibility work
• walking re-education

You will usually use elbow crutches and a knee brace during the early recovery period.

Later stages of rehabilitation

As healing improves, treatment progresses to restore strength, movement, and control. This may include:

• progressive strengthening exercises
• advanced range of motion work
• flexibility training
• balance and proprioception exercises
• gait re-education
• functional rehabilitation drills
• sport- or activity-specific retraining

Some programmes may also include supportive treatment such as electrotherapy, depending on clinical judgement and your recovery stage.

Benefits of physiotherapy after LCL surgery

Physiotherapy helps by:

• reducing pain and swelling
• restoring knee movement
• rebuilding strength
• improving knee stability
• improving walking pattern
• improving balance and control
• reducing re-injury risk
• supporting return to work, exercise, and sport

What Shouldn’t I Do?

If you are recovering from LCL surgery, avoid:

• walking without support before you are advised
• removing your brace too early if instructed to wear one
• twisting on the knee too soon
• returning to sport too early
• doing heavy exercise before the ligament has healed
• ignoring increasing pain or swelling
• skipping physiotherapy or home exercises

Doing too much too soon can slow recovery and increase the risk of complications or re-injury.

Long-Term Effects or Recovery

Recovery after LCL surgery often takes around 3 months or longer, depending on:

• the severity of the injury
• whether other ligaments were also damaged
• the type of surgery performed
• your strength and movement before surgery
• your consistency with rehabilitation
• your sport or work demands

With proper surgery and physiotherapy, many patients recover well and return to normal activities. Without proper rehab, there is a greater risk of:

• ongoing knee instability
• weakness
• reduced knee function
• slower recovery
• repeated injury
• early joint wear and arthritis over time

A structured rehab plan is important for long-term knee health.

Why Choose ACE Physio Sports

At ACE Physio Sports, we provide personalised rehab for:

• LCL surgery recovery
• LCL reconstruction physiotherapy
• outer knee ligament rehab
• post-operative knee ligament physiotherapy
• sports injury rehabilitation
• return-to-sport knee rehab

Why patients choose us:

• personalised rehab programmes
• clear step-by-step recovery guidance
• focus on strength, stability, and safe progression
• sports injury rehabilitation expertise
• patient-friendly explanations
• evidence-based physiotherapy

If you are looking for LCL surgery physiotherapy in Singapore, ACE Physio Sports on East Coast Road can help guide your recovery.

Book Appointment

If you have an LCL tear, need rehab after LCL reconstruction, or want expert help for knee ligament recovery, book an assessment with ACE Physio Sports.

ACE Physio Sports Website: acephysiosport.com Phone: +65 81535374 Email: admin@acephysiosport.com

Book your physiotherapy appointment today.