MCL Tear
The medial collateral ligament (MCL) runs along the inner side of the knee, connecting the thighbone to the shinbone and preventing the knee from buckling inward. MCL tears are among the most common knee injuries in contact and collision sports. They range from mild stretching (Grade 1) to a complete rupture (Grade 3), and unlike ACL tears, most heal without surgery.
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Symptoms
- Pain and tenderness along the inner edge of the knee
- Swelling on the inside of the knee
- Stiffness and difficulty bending or straightening the leg fully
- Feeling of instability or the knee giving way sideways
- Bruising on the inner knee within 24–48 hours
- Pain when pressure is applied to the outside of the knee (valgus stress)
When to See a Doctor
See a sports medicine physician or orthopaedic surgeon if your knee swells after a collision or twist, if it feels unstable when walking, or if pain does not improve within a few days. Grade 3 tears—especially combined with an ACL tear—need prompt evaluation.
Treatment Options
RICE and bracing (Grade 1–2)
Rest, ice, compression, and elevation for the first 48–72 hours. A hinged knee brace protects the ligament while healing. Most Grade 1 and 2 tears heal fully with this approach.
Physical therapy
Strengthening the muscles around the knee, particularly the quadriceps and hamstrings, reduces stress on the MCL and restores stability. Typically 4–8 weeks for Grades 1–2.
MCL reconstruction surgery
Rarely needed for isolated MCL tears. Surgery is considered for Grade 3 tears that fail to heal, combined ligament injuries (MCL + ACL), or chronic instability. The ligament is reconstructed using a graft.
Recovery Timeline
Grade 1: return to sport in 1–3 weeks. Grade 2: 3–6 weeks. Grade 3: 3–4 months with bracing and therapy; surgical cases take 6–9 months. Most isolated MCL tears—even complete ruptures—heal without surgery.
Frequently Asked Questions
Can an MCL tear heal without surgery?
Yes, most MCL tears—including many complete (Grade 3) ruptures—heal with bracing and physical therapy. The MCL has a good blood supply, which helps it repair on its own. Surgery is mainly considered when the tear does not heal conservatively, or when the MCL tear is combined with an ACL or PCL injury.
How do you tell an MCL tear from an ACL tear?
Both can cause swelling and instability, but the location of pain is different. MCL tears cause pain on the inner side of the knee; ACL tears usually cause pain deep inside the knee joint with a feeling of giving way during pivoting. An MRI can definitively identify which ligament is injured—and whether both are torn.
What type of doctor treats MCL tears?
Sports medicine physicians and orthopaedic surgeons both treat MCL tears. Sports medicine doctors handle most non-surgical cases, while orthopaedic surgeons who specialize in knee surgery manage complex or combined ligament injuries.
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This information is for educational purposes only and is not a substitute for professional medical advice. Always consult a qualified healthcare provider for diagnosis and treatment.