Sprain inside the knee: what to know

The medial collateral ligament supports the inner side of the knee. A force pushing the knee inward, a sudden change of direction, or a sports impact can stretch it. Pain is often felt along the inner joint line or ligament, with tenderness when touched. Swelling, stiffness, limping, or a feeling of reduced confidence may follow. Meniscus, tendon, bone, or other ligament injuries can produce similar symptoms, so an examination matters when pain is substantial or function is limited.

Protect the knee from twisting and impact, but keep gentle pain-limited movement to reduce stiffness. Elevate the leg when resting, and use a wrapped cold pack for short periods after a recent injury. A clinician may recommend a brace or [Splinting](/treatments/trauma-and-fracture-care/splinting/) depending on stability. [Physiotherapy](/treatments/physiotherapy-and-rehabilitation/physiotherapy/) can restore motion, balance, and strength in stages. [Kinesiology Taping](/treatments/physiotherapy-and-rehabilitation/kinesiology-taping/) may be an optional adjunct, not a substitute for evaluation.

Seek prompt assessment if you cannot bear weight, the knee is visibly deformed, it locks, gives way repeatedly, or swelling appears quickly after injury. Urgent care is appropriate for a cold or pale foot, new numbness, or severe worsening pain. Medical review is also sensible when symptoms do not steadily improve, because combined injuries may need different management.

Which structure is tender or unstable? Do I need a brace, imaging, or crutches? What exercises are safe, and when can I return to running, work, or sport?