What is an MCL injury?
The medial collateral ligament (MCL) is a strong band on the inner side of the knee. It links the thigh bone to the shin bone and stops the knee from buckling inward. An MCL injury is a sprain or tear of that band.
It is graded by severity. A mild sprain stretches the fibres, a moderate one tears some of them, and a severe one tears the ligament completely.
How does it happen?
The classic cause is a force from the outside of the knee that pushes it inward. A football or futsal tackle, a collision on the court, or a heavy fall on a planted foot are textbook examples.
In Ipoh it can also happen on an ordinary day. A leg that slides out on a wet bathroom floor or a slippery trail at Bukit Kledang can splay sideways and strain the inner ligament. A wide badminton lunge can do it too.
The knee hurts along the inside, may swell a little, and feels tender when you press the inner side. Climbing stairs or turning may feel unsteady.
Who is it most likely to affect?
Sportspeople in contact and pivoting sports are at most risk, such as football, futsal, badminton and martial arts. Older adults can also strain the ligament in a slip or fall, particularly with stiff knees from wear and tear in the joint.
An MCL sprain can come with other injuries. If the knee feels loose, or swelled quickly with a pop, check the anterior cruciate ligament (ACL) and the meniscus, because the three can be injured together.
What does a physiotherapist check first?
We ask how it happened, which way the knee was pushed and how it behaves now. Then we examine it.
We check:
- where the inner knee is tender.
- how the knee opens when we gently test the ligament, compared with the other side.
- swelling, warmth and range of movement.
- tests for the other ligaments and the meniscus.
- thigh, hip and calf strength, and your walking.
If the tests suggest a larger injury, a fracture or a locked knee, we arrange for you to see a doctor.
What helps an MCL injury?
Most sprains heal well with protection first and then progressive loading. The ligament is happier with early, gentle movement than with long immobilisation.
A plan can include:
- a brace for a period, if advised, and a stick when walking is painful.
- gentle range of movement exercises as pain allows.
- strengthening for the thigh, hip and calf, built up in stages.
- balance and control training, then changes of direction.
- a graded return to sport based on how the knee tests, not the calendar.
Recovery varies between people, so we review the plan at each visit. For sport-specific advice, see sports rehabilitation.
What can I do this week?
Protect the inner knee while keeping it moving.
- Walk on flat ground in short spells, with a stick if the knee feels loose.
- Take stairs one at a time, holding the rail.
- Avoid twisting and sideways pushes until assessed.
- Dry the bathroom floor and use a non-slip mat.
- Do gentle thigh squeezes while seated, a few times a day.
Stop an exercise if it leaves the pain sharper for more than a few hours.
When should I see a doctor first?
Go to the emergency department if the knee cannot bear weight, looks out of shape, swells very quickly or locks. Go too if it is red and hot with a fever, or the calf swells and hurts.
See a doctor if the knee feels unstable or gives way, or if you heard a pop at the time of injury. Hospital Raja Permaisuri Bainun, Fatimah Hospital and Pantai Hospital Ipoh can arrange assessment and scans.
How do home sessions in Ipoh work?
A physiotherapist visits your house, examines the knee and watches how you manage your own stairs and bathroom. We teach protective movement and strengthening you can repeat daily.
Visits across Ipoh are available now, and our Canning Garden centre near Fatimah Hospital is opening soon. Prices are quoted on WhatsApp after a short description.
Read how home physiotherapy works, the wider page on knee pain, and our blog on futsal ankle and knee injuries.