What is considered a serious knee injury?

Author: Cloyd Frami  |  Last update: Saturday, June 14, 2025

If you've hurt your knee, it's important to assess the damage so you can decide whether you should see a doctor. A key sign to look for is swelling. “Serious injuries cause a lot of swelling in the knee, especially in younger patients,” says Christina Allen, MD, division chief of Sports Medicine.

How do I know if my knee injury is serious?

Call your doctor if you:
  1. Can't bear weight on your knee or feel as if your knee is unstable or gives out.
  2. Have marked knee swelling.
  3. Are unable to fully extend or flex your knee.
  4. See an obvious deformity in your leg or knee.
  5. Have a fever, in addition to redness, pain and swelling in your knee.

What is classed as a severe knee injury?

More severe injuries, such as ligament tears, meniscus tears or fractures may require surgery and therefore have a longer recovery period.

What is the hardest knee injury to recover from?

A torn anterior cruciate ligament (ACL) is the hardest sports injury that takes more recovery time. It is usually 12 months.

What are three signs of a meniscus tear in the knee?

A popping sensation. Swelling or stiffness. Pain, especially when twisting or rotating your knee. Difficulty straightening your knee fully.

How do I know if my knee injury is serious?

Can you still walk if you tear your meniscus?

A torn meniscus usually produces well-localized pain in the knee. The pain often is worse during twisting or squatting motions. Unless the torn meniscus has locked the knee, many people with a torn meniscus can walk, stand, sit, and sleep without pain.

How do I know if I tore my ACL or meniscus?

ACL tears are often associated with a popping sound, immediate swelling, and a feeling of instability. MCL tears commonly cause knee pain and tenderness along the inner side of the knee. Meniscus tears may produce a popping sensation, locking or catching of the knee, and difficulty straightening the leg.

Can you still walk with a torn ligament in your knee?

The short answer is yes. After the pain and swelling subsides and if there is no other injury to your knee, you may be able to walk in straight lines, go up and down stairs and even potentially jog in a straight line. The ACL (anterior cruciate ligament) is an important ligament that provides stability to the knee.

What does an MCL tear feel like?

What are MCL tear symptoms? The most noticeable MCL tear symptom is pain on the inside of your knee directly over the ligament. You may also hear and feel a “popping” sensation in your knee at the time of injury. Other common symptoms include bruising, knee instability, swelling, and the inability to hold your weight.

Should you keep your leg straight or bent with a torn meniscus?

Quad sets: Lie down on the floor or the bed with your injured leg straight. Fully extend your leg—there should be no or little bend in your knee.

What is the #1 mistake that makes bad knees worse?

1. You aren't moving enough. One of the biggest mistakes we see patients with knee pain make is to begin using their knees less.

What are the three C's of knee injuries?

Core Tip: Traditionally, the anterior cruciate ligament (ACL), medial collateral ligament (MCL), and medial meniscus (MM) were thought to be the unhappy triad of the knee; however, lateral meniscus injuries are thought to be more common in association with ACL and MCL tears.

Is it better to rest or walk with knee pain?

You can usually treat knee pain at home with the RICE method: Rest: Stop the physical activity that caused the pain to avoid making the injury worse. Ice: Apply an ice pack or cold compress for 15 to 20 minutes every hour for the first day after your injury. After one day, you can apply ice every three to four hours.

What are the symptoms of a torn tendon in the knee?

Symptoms include:
  • A tearing or popping sensation.
  • Swelling and inflammation.
  • Tenderness and bruising.
  • Upwards movement of the kneecap towards the thigh.
  • The knee giving way when you walk.

What kind of knee pain should I worry about?

Contact your provider if: You cannot bear weight on your knee. You have severe pain, even when not bearing weight. Your knee buckles, clicks, or locks.

How do I know if I tore my meniscus?

Symptoms of a meniscus tear may be different for each person, but some of the most common symptoms are: Pain in the knee joint: usually on the inside (medial), outside (lateral) or back of the knee. Swelling. Catching or locking of the knee joint.

Can you bend your knee with a torn ligament?

A torn ligament severely limits correct knee movement. This results in the inability to pivot, turn, or twist the leg. Surgery is a choice to fix a torn ligament if other treatment does not work. The ligaments in the knee connect the femur (thighbone) to the tibia (shin bone).

How do you tell if a ligament is stretched or torn?

A ligament injury is sometimes indicated by a “popping” sound and can be very painful, often accompanied by swelling and bruising. This popping sound is usually heard when an ACL (anterior cruciate ligament) is torn. A tear to the ACL in the knee is one of the most common ligament injuries in sports.

What part of the knee hurts with a torn ACL?

An injury to your anterior cruciate ligament is usually accompanied by a "popping" noise and a feeling that your knee gives out from under you. Other signs and symptoms of an ACL injury include: Pain on the outside and back of the knee.

What can be mistaken for a meniscus tear?

Common extra-articular pathologies that can mimic lateral meniscal tears include iliotibial band syndrome, proximal tibiofibular joint instability, snapping biceps femoris or popliteus tendons, and peroneal nerve compression syndrome or neuritis.

Should I wear a knee brace with a torn meniscus?

Normally, braces are used to stabilize a joint. Since menisci are not crucial for knee stability, you might not need a brace to help your injury heal. However, if there is damage to the surrounding ligaments as well, a brace may be necessary because ligaments are important for joint stability.

What are the worst exercises to do with a torn meniscus?

More videos on YouTube
  1. Doing too much. During the initial stages of meniscus injury it's really important to lessen the load on the knee to enable it adequate time to recover. ...
  2. Twisting your knee. ...
  3. Running. ...
  4. Being Immobile. ...
  5. Breaststroke. ...
  6. Deep Squatting.

Does a torn meniscus hurt all the time?

There is often sharp pain when you twist or squat. Symptoms may go away but can come back from overuse or when you do activities that involve twisting. The pain may come and go over a period of years if the tear isn't treated. Larger tears usually cause more pain and immediate swelling and stiffness.

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