Dr. Rami Hamed Medical Blog

Can't Straighten Your Knee? A Torn ACL or Meniscus Could Be the Reason

Written by Dr. Rami Hamed | June 03, 2025

Struggling to fully straighten your knee is more than just an inconvenience—it can seriously interfere with walking, standing, or even sleeping comfortably. If you’ve noticed a feeling of tightness, catching, or locking in the knee joint, especially after a twist or sudden movement, a torn ACL (anterior cruciate ligament) or meniscus may be to blame.

At DRHC Dubai, we often see patients who arrive worried about what their symptoms mean and whether surgery is the only solution. The good news is that there are multiple treatment options, and getting the right diagnosis is the first step toward recovery.

ACL vs. Meniscus Tear: What’s the Difference?

Both the ACL and meniscus are vital structures in your knee that help keep the joint stable and functioning smoothly:

  • The ACL is a strong ligament that connects the thigh bone (femur) to the shin bone (tibia) and controls knee stability during movement.
  • The meniscus is a C-shaped piece of cartilage that cushions the joint and helps absorb shock.

Injuries to either of these can make it difficult—or even impossible—to straighten your knee fully.

Common Symptoms of ACL or Meniscus Tears

You may be dealing with one of these injuries if you experience:

  • Sudden pain during or after a twist, jump, or awkward landing
  • A popping sound at the time of injury
  • Swelling that develops within a few hours
  • A feeling that your knee “gives out” or buckles
  • Difficulty straightening the leg or full extension without pain
  • Locking or catching sensation when moving the knee

Why Can’t You Straighten Your Knee?

When the ACL is torn, the knee becomes unstable, and swelling inside the joint can limit movement. A torn meniscus, especially when the fragment flips or folds, can mechanically block the joint—making it hard to extend the knee completely. This condition is sometimes called a “locked knee.”

Diagnosis: Getting to the Root of the Problem

At DRHC Dubai, our orthopedic team uses a combination of advanced imaging and physical examination to identify the cause of restricted knee movement. This may include:

  • Physical tests to check for joint stability and range of motion
  • MRI scan to confirm the extent and location of the tear
  • X-rays to rule out bone injuries

A prompt and accurate diagnosis ensures the best treatment plan for long-term joint health.

Treatment Options: From Conservative to Surgical

Your treatment plan will depend on the type of tear, your activity level, and how severely your movement is affected.

1. Non-Surgical Options (for partial tears or minor injuries)

  • Rest, ice, compression, and elevation (RICE)
  • Anti-inflammatory medications
  • Physical therapy to strengthen surrounding muscles
  • Knee braces to provide support

These treatments are especially helpful for small meniscal tears or partial ACL injuries in less active individuals.

2. Surgical Treatment (for complete tears or locked knees)

When the knee cannot fully extend or if instability affects your ability to walk or exercise, surgery might be recommended.

  • Arthroscopic Meniscus Repair or Removal: A minimally invasive procedure to remove or repair the torn part of the meniscus. Often done as a daycare surgery, with a short recovery time.
  • ACL Reconstruction: If the ACL is completely torn and the knee remains unstable, a reconstruction using a graft from your tendon or a donor may be needed

At DRHC Dubai, our expert orthopedic surgeons perform advanced arthroscopic procedures using small incisions for faster recovery and less discomfort.

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FAQs About Knee Injury Treatment

Is surgery always necessary for a torn ACL or meniscus?
No. Not every tear needs surgery. Many partial tears and small meniscus injuries can be managed with physical therapy and time. Surgery is generally reserved for severe cases or when conservative care fails.

How long is recovery after knee surgery?

  • Meniscus surgery recovery: usually 2–6 weeks depending on the type of procedure
  • ACL reconstruction: typically 4–6 months of rehabilitation, especially if returning to sports

Is the pain after surgery manageable?
Yes. Post-operative discomfort is usually mild and well-controlled with medications. Minimally invasive techniques reduce tissue damage and speed up healing.

What happens if I don’t treat a tear?
Untreated injuries can lead to worsening instability, cartilage damage, or early arthritis. Getting proper care early helps protect your long-term joint function.

When to Seek Help

If you can’t straighten your knee fully, feel instability, or experience locking and pain, it’s time to consult a specialist. Delaying care can worsen the injury or cause additional damage to the joint.

At DRHC Dubai, our orthopedic team offers personalized evaluations and treatment plans tailored to your lifestyle, activity level, and health goals. Whether you need conservative care or surgical intervention, we’re here to guide you every step of the way.

Conclusion: You Don’t Have to Live with a Locked Knee

Knee problems can be unsettling—but with the right diagnosis and timely treatment, most patients recover well and regain full function. If you suspect a torn ACL or meniscus, don’t wait for it to worsen.

Contact DRHC Dubai today to schedule a consultation. Our orthopedic specialists are committed to providing expert care with clarity, compassion, and proven results—so you can walk, move, and live with confidence again.

Call +97142798200 us now to schedule your consultation today!
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