MCL Reconstruction Recovery
Medial Collateral Ligament Reconstruction
What the operation does
The medial collateral ligament runs down the inner side of the knee and stops it buckling inward. Where it has failed and the knee gives way sideways, this operation replaces it with a graft anchored into the thigh bone and the shin bone along the line the original ran, restoring the checkrein against the knee collapsing inward.
Why most MCL injuries never need surgery
Worth knowing, because it explains why yours is unusual. Unlike the cruciate ligaments buried inside the joint, the MCL sits outside it with a generous blood supply, and it heals remarkably well on its own — most MCL tears, including severe ones, are treated in a brace and recover without an operation. Reconstruction is reserved for the minority where that healing did not happen, where the knee remains loose months later, or where several ligaments were torn at once.
Stiffness is the main risk here
This is the distinctive thing about MCL surgery, and it runs opposite to most of what you may have read about knee ligaments. Because the MCL is outside the joint and scars readily, the characteristic problem afterwards is a knee that will not bend or straighten, rather than one that stretches out again. That is why movement leads this programme from the first phase, and why sitting still with the leg propped up is the wrong instinct.
What you protect against
Sideways force — anything pushing the knee inward — and twisting. Straight-line movement is safe and encouraged early. That is a narrower restriction than after a cruciate reconstruction and it is why walking and bending come back relatively quickly while cutting sports stay off the list for months.
The hinged brace
You will usually be in a brace with hinges that allow bending and straightening while blocking sideways movement. It is doing exactly the job the ligament does, and it is why you can work on motion safely inside it. It is typically worn for around six weeks, longer if other ligaments were reconstructed.
If this was done with an ACL reconstruction
Common, because the two are often torn together, and it changes the plan. The ACL becomes the pacing structure — its restrictions on twisting, pivoting and return to sport are longer than the MCL's, so your recovery follows those. The early emphasis on regaining motion still applies, and matters more when two structures are healing.
Where the graft came from
Usually a hamstring tendon from the same leg, sometimes donor tissue, occasionally a nearby tendon left partly attached. Where your own hamstring was used, the back of the thigh will be sore and weak for some months, which is separate from the knee itself and settles with the strengthening later in the programme.
The incision and numbness
The incision runs down the inner side of the knee, and small nerves cross it. Numbness on the inner side of the knee and below it is very common afterwards, often over a patch larger than the scar. It usually shrinks over months and frequently leaves a permanent area. It rarely causes any practical problem beyond noticing it when kneeling.
Swelling
The knee swells for two to four months, worse in the evening and after activity. Swelling that returns as you increase activity is useful feedback rather than a setback — it usually means the build was a little quick.
Kneeling
Often uncomfortable for longer than anything else, because the graft fixation and the scar sit exactly where the knee meets the floor. Most people find it settles over six months to a year, and a cushion is a reasonable interim answer rather than a sign something is wrong.
Returning to running
Commonly around three to four months, as a graded jogging progression on flat, even ground once strength and swelling allow. Straight-line running loads the MCL far less than sideways movement does.
Returning to sport
Usually somewhere between six and nine months for sports involving cutting, pivoting or contact — the movements that load the ligament directly. Straight-line and controlled sport generally returns earlier. Where an ACL was reconstructed at the same time, that timetable takes over.
Driving and work
For a right knee, driving generally waits until you are out of the brace, off crutches, and could brake hard without hesitating — commonly around six to eight weeks. A left knee in an automatic is much sooner. Desk-based work is often possible within one to two weeks; work on your feet commonly two to three months.
How the recovery usually unfolds
The first two weeks are about swelling, quadriceps activation and — importantly — getting the knee moving inside the brace. Two to six weeks brings full movement, normal walking and the brace coming off. Six to twelve weeks is strength building. Three to six months brings running and controlled activity back. Six to twelve months brings cutting and contact sport, guided by strength and confidence.
Staying in touch with your care team
Whether other ligaments were reconstructed at the same time changes this recovery more than anything else, and your surgeon knows what was done. If something about your recovery is worrying you or does not match what is described here — particularly a knee that is losing movement rather than gaining it — contact your care team.
Exercises for MCL Reconstruction
An illustrated, phase-by-phase exercise program for this procedure. View the MCL Reconstruction exercise program.
Recovery education · Condition guides · Exercise programs
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This guide is general education and doesn't replace evaluation by a licensed provider. Recovery and treatment vary by person — follow the guidance of your own surgeon or care team.