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Injuries to Medial Meniscus

Injuries to the medial meniscus are one of the most common knee problems I see in orthopedic practice. In Dhaka and across Bangladesh, patients often come after a twisting injury during football, cricket, badminton, gym activity, stair misstep, or even after something as simple as standing up awkwardly from a low sitting position. Many describe pain on the inner side of the knee, swelling, difficulty squatting, or a feeling that the knee catches or locks during movement.[1][2]

One important point I want Bangladeshi patients and families to understand is that the medial meniscus is not just “cartilage.” It is an important shock absorber and stabilizer inside the knee. A medial meniscus injury can affect comfort, movement, confidence in walking, and sometimes long-term joint health if the problem is ignored or repeatedly aggravated.[1][2]

What the medial meniscus is

Each knee has two menisci: one on the inside and one on the outside. The medial meniscus is the inner meniscus. It sits between the femur and tibia and helps spread load, absorb shock, improve joint stability, and protect the smooth articular cartilage.[1][3]

In simple language, I often tell patients that the medial meniscus acts like a cushion and stabilizing wedge inside the knee. It helps the knee move smoothly under body weight, especially during walking, squatting, turning, and stair climbing.

Why injuries to the medial meniscus are so common

The medial meniscus is commonly injured because it takes significant load and can be stressed during twisting movements. It may tear during sports, falls, road traffic trauma, or awkward rotation on a planted foot. It can also tear gradually as the tissue becomes more worn with age.[1][2]

Common Bangladesh-related situations

football or cricket twisting injury
badminton pivot or landing
slipping on wet floors
climbing or descending stairs quickly
squatting for household tasks
getting up from floor sitting
kneeling and lifting
sudden twist during daily prayer posture transitions

AAOS explains that meniscus tears can happen after acute trauma or as part of degenerative wear over time.[2]

Acute tear versus degenerative tear

Not every medial meniscus injury happens the same way. This distinction matters because treatment choices may be different.

Acute medial meniscus tear

An acute tear is more likely after a clear injury, especially in a younger or active patient. These patients often remember the exact movement that triggered pain. They may feel a pop, followed by swelling and inner-knee pain over the next hours or days.[1][2]

Degenerative medial meniscus tear

A degenerative tear is more common in middle-aged or older patients. In these cases, the meniscus becomes weaker over time and may tear after a relatively small movement, such as twisting while standing up or turning in the kitchen.[2][4]

I usually explain to my patients that degenerative tears often overlap with early osteoarthritis, which is why the full knee picture matters more than the MRI word “tear” alone.

Symptoms of medial meniscus injury

The symptom pattern can vary, but there are several classic complaints.

Common symptoms I hear from patients

pain along the inner side of the knee
swelling that develops over hours or days
difficulty squatting
stiffness
clicking or catching
locking or blocking sensation
the knee giving way
pain while using stairs
reduced confidence during turning movements

MedlinePlus and AAOS both note that meniscus tears commonly cause pain, swelling, stiffness, catching, locking, and reduced range of motion.[1][2]

Why medial meniscus injuries matter

Some patients try to walk through the pain and assume the problem will automatically settle. Sometimes symptoms do improve. But repeated twisting, recurrent locking, or persistent pain may lead to more difficulty over time.

The medial meniscus helps protect the articular cartilage in the knee. If important meniscal function is lost, the joint may be exposed to more stress. That is one reason why proper treatment matters, especially in active patients and in those with ongoing mechanical symptoms.[2][3]

How I assess a medial meniscus injury

When I evaluate patients with this problem, I first listen carefully to the injury story. The history often gives strong clues.

Questions I usually ask

Was there a specific twist or sports injury?
Did swelling come early or later?
Is the pain mainly on the inner side of the knee?
Is there catching, locking, or clicking?
Can the patient fully bend and straighten the knee?
Is the knee unstable?
Is there a previous ACL or ligament injury history?

Examination findings I pay attention to

tenderness along the medial joint line
pain with twisting tests
swelling
motion loss
signs of ligament instability
signs of patellofemoral pain or arthritis

AAOS notes that joint line tenderness and provocative twisting tests such as the McMurray test can help support the diagnosis.[2]

Imaging and diagnosis

X-rays do not show the meniscus itself, but they help rule out fracture, alignment issues, and arthritis. MRI is often the most useful imaging test when I need to confirm a suspected acute meniscus tear or evaluate associated ligament and cartilage injuries.[2]

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MRI becomes especially useful when:

the diagnosis is uncertain
symptoms persist
the knee locks or catches
surgery is being considered
an ACL injury is also suspected

AAOS states that MRI is the preferred way to diagnose acute meniscus tears because of its high accuracy for soft tissue assessment.[2]

Not every medial meniscus tear needs surgery

This is one of the most important things I explain to patients in Bangladesh.

Some tears improve with conservative treatment, especially if symptoms are settling and there is no true locking, no major instability, and no persistent functional block. Others may need arthroscopic treatment because the torn fragment keeps causing pain or mechanical symptoms.[1][2]

Non-surgical treatment may be reasonable when:

pain is improving
there is no true locking
swelling is settling
the knee remains functionally stable
the tear pattern and patient profile support conservative care

Surgery becomes more likely when:

there is recurrent locking or catching
pain remains significant
the knee cannot move properly
the patient is young and active with a repairable tear
associated injuries are present
rehabilitation alone has failed

Meniscus repair versus trimming

Patients often ask whether surgery means “repair” or “cutting away the torn part.” The answer depends on tear type, tear location, tissue quality, age, and activity level.

The outer portion of the meniscus has a better blood supply than the inner portion. Because healing potential is better in that outer area, some tears are more suitable for repair. Other tears, especially unstable fragments in poorly healing zones, may need partial meniscectomy or trimming rather than repair.[2][3]

AAOS explains that when loose or partly detached tissue is causing catching and pain, simple trimming may be recommended instead of repair in selected situations.[3]

Recovery and rehabilitation

Whether treatment is surgical or non-surgical, rehabilitation matters a great deal.

Important recovery goals

reduce swelling
restore full motion
rebuild quadriceps strength
improve balance and knee control
return safely to daily function
later return to sports where appropriate

For Bangladeshi patients, practical recovery planning matters because normal life often includes stairs, floor sitting, squatting, commuting, and busy work routines. I usually explain that even if pain improves early, returning too quickly to twisting activity can bring symptoms back.

When medial meniscus injury overlaps with other knee problems

Medial meniscus injuries do not always happen alone. I often see them together with:

ACL injury
articular cartilage damage
osteoarthritis
knee locking from loose fragments
joint swelling

This is why the evaluation should not be too narrow. A patient may focus only on one painful point, but the true problem may involve overall knee stability and joint health.[1][2]

When urgent review is more important

Most meniscus injuries are not emergencies in the same way as fractures or dislocations, but some symptom patterns deserve faster review.

Seek early orthopedic assessment if:

the knee locks and will not straighten
swelling is severe
weight-bearing becomes difficult
there is repeated giving way
the knee becomes significantly stiff
symptoms follow a major sports or traffic injury

If the knee is truly locked, a displaced meniscus tear may be responsible and should not be ignored.[1][2]

My practical advice for Bangladeshi patients

If you have pain on the inner side of the knee after twisting, squatting, sport, or awkward movement, do not assume it is only a temporary sprain. Medial meniscus injuries may settle with the right early care, but persistent catching, locking, swelling, or pain with activity deserves proper assessment.

In my practice, I try to guide patients toward realistic decisions. Some patients improve with structured rehabilitation, activity modification, and time. Some need arthroscopic treatment. The correct path depends on the tear pattern, symptoms, age, activity demands, and the condition of the rest of the knee.

Bottom line I share with patients

Injuries to the medial meniscus are common, especially in active people and in adults whose knee cartilage has already started to age. The most common clues are inner knee pain, swelling, catching, locking, and difficulty with squatting or turning.[1][2]

The good news is that many patients do well when the diagnosis is clear and treatment is matched to the actual problem. For Bangladeshi patients, early orthopedic evaluation can help prevent months of repeated pain, avoidable stiffness, and unnecessary delay in the right treatment.

References

MedlinePlus. Meniscus tears – aftercare. Available at: https://medlineplus.gov/ency/patientinstructions/000684.htm
American Academy of Orthopaedic Surgeons. Meniscus Tears. Available at: https://orthoinfo.aaos.org/en/diseases–conditions/meniscus-tears/
American Academy of Orthopaedic Surgeons. Meniscus Repair. Available at: https://orthoinfo.aaos.org/en/treatment/meniscus-repair/
NHS. Meniscus tear (knee cartilage damage). Available at: https://www.nhs.uk/conditions/meniscus-tear/
MedlinePlus. Meniscal tears. Available at: https://medlineplus.gov/ency/imagepages/9621.htm

FAQs BY PATIENTS

What does medial meniscus mean?

The medial meniscus is the inner cushioning cartilage of the knee. It helps absorb shock, improve stability, and protect the joint surfaces during movement.[1][2]

Can a medial meniscus tear heal without surgery?

Some tears can improve without surgery, especially if symptoms are mild, there is no true locking, and the knee remains stable. But persistent pain, catching, or locking may need further orthopedic treatment.[2][3]

Why does the pain usually stay on the inner side of the knee?

Because the medial meniscus is on the inner side of the joint, tears there often cause joint line tenderness and pain in that area, especially during twisting, squatting, or stair use.

Is MRI always necessary for a medial meniscus injury?

Not always. Sometimes the history and examination are strongly suggestive. But MRI becomes very useful when the diagnosis is uncertain, symptoms persist, or surgery is being considered.[2]

When should I worry more about a medial meniscus injury?

You should seek earlier assessment if the knee locks, swelling is significant, weight-bearing becomes difficult, or the knee keeps catching or giving way after injury.[1][2]