Treatment of Medial Collateral Ligament (MCL) Injury

Initial Management

Most isolated MCL injuries, including complete grade III tears, should be treated non-surgically with early functional rehabilitation, as this approach results in good patient outcomes in the majority of cases 1, 2
Control pain and swelling using the PRICE protocol (Protection, Rest, Ice, Compression, Elevation) immediately after injury 2
Consider aspiration of painful, tense knee effusions for symptomatic relief 1, 2
Obtain radiographs if indicated by clinical examination to exclude fractures or bony avulsions 2

Non-surgical treatment of the MCL component results in good patient outcomes even when the ACL is surgically reconstructed 1, 2, 3, 4
The ACL should be reconstructed surgically (preferably within 3 months to prevent additional meniscal and cartilage damage), while the MCL heals with conservative management 2
Surgical treatment of the MCL may be considered only in select cases with severe instability 1, 2

Prophylactic knee braces are not recommended for preventing MCL injuries, as evidence of effectiveness is limited and they may actually increase forces on the medial knee 1, 2, 5, 6
Functional braces may be used for support during rehabilitation of mild to moderate MCL instability 6

Functional evaluation should guide return to sport decisions rather than time-based protocols alone 2
Inadequate treatment or premature return can lead to chronic problems including decreased range of motion, pain, and joint instability 2