By Dr. Ajaz Siddiqui, MD, DABA, DAPBM
Medical Director, Performance Ortho Hillsborough

Why Your Knee Is Making Noise

If you have ever noticed a clicking, popping, or cracking sound in your knee, you are not alone. These noises are extremely common and often happen during everyday movements like bending, squatting, or climbing stairs. In many cases, they are completely harmless. However, there are situations where these sounds may signal an underlying issue that should not be ignored. At Performance Ortho, we’ve helped provide relief to patients presenting with all types of knee pain across New Jersey for over 25 years.

The key question is simple. Is your knee noise normal, or is it something that requires medical attention? Understanding the cause behind the sound is the first step toward protecting your joint health and preventing more serious problems as you age.

What Causes a Clicking or Popping Knee?

One of the most common causes of knee noise is the release of gas bubbles within the joint fluid. This process, known as crepitus, is similar to cracking your knuckles. While potentially uncomfortable, it is typically painless and does not indicate damage to the joint.

As your knee moves, tendons and ligaments can shift slightly over surrounding bone structures. This can create a snapping or popping sensation, especially during bending or squatting. In most cases, this is a normal part of joint mechanics unless it is accompanied by pain.

Tight or imbalanced muscles around the knee, including the quadriceps, hamstrings, and IT band, can affect how the joint tracks during movement. This can lead to clicking sounds as structures move unevenly through the range of motion.

Harmless Knee Noises (No Cause for Concern)

Not all knee noises are a problem. In fact, many are simply part of normal joint function. If your knee clicking occurs without pain, swelling, or instability, it is usually not a cause for concern.

Signs that your knee noise is likely harmless include full range of motion, occasional clicking during movement, and no sensation of the knee giving out. In these cases, no treatment is typically needed beyond maintaining strength and mobility.

When Knee Popping May Be a Problem

If knee clicking or popping is paired with sharp or persistent pain, it may indicate irritation or structural damage within the joint. Inflammation, swelling, or stiffness often suggests that the knee is reacting to injury or overuse. These visual cues accompanied with clicking or popping is often a strong sign to go get evaluated by an orthopedic specialist.

Furthermore, a knee that feels stuck or unable to fully extend may point to a mechanical issue such as cartilage damage. If your knee feels like it may buckle or cannot support your weight, it is especially important to seek evaluation promptly.

Common Conditions Associated with Knee Clicking

Meniscus Tears

Damage to the cartilage within the knee can cause popping, catching, or locking sensations, especially during rotation or weight-bearing activities.

Patellofemoral Pain Syndrome (Runner’s Knee)

This condition occurs when the kneecap does not track properly over the joint. It is common in active individuals and often produces clicking along with front-of-knee discomfort.

Ligament Injuries

Ligament damage can lead to instability and abnormal movement within the knee, often accompanied by noticeable popping at the time of injury.

Knee Arthritis

As cartilage wears down over time, the joint surfaces become less smooth. This can lead to grinding or crunching sensations during movement.

Dr. Ajaz Siddiqui notes,

“Knee noise by itself is not always a problem. What matters is what comes with it. Pain, swelling, or instability are the signals we look for when determining if something more serious is going on.”

Exercises That May Help Reduce Knee Clicking

Strength and flexibility play a major role in how your knee functions. Targeted exercises can help improve joint mechanics and reduce unnecessary stress. If you’re presenting with any of the pain or inflammation signs mentioned above, it’s best to complete an orthopedic evaluation before diving into any additional strengthening movements that may further your condition.

Otherwise, focus on strengthening the quadriceps through movements like straight leg raises, while also building glute strength with exercises such as bridges. Stretching the hamstrings and IT band can improve flexibility and reduce tension around the joint. Incorporating hip stability exercises further supports proper knee alignment during movement.

When to See a Specialist

While occasional clicking is normal, persistent symptoms should not be ignored. You should consider seeing a specialist if you experience ongoing pain, swelling, or stiffness, as well as any locking or catching sensations. Reduced mobility or clicking that begins after a specific injury are also strong indicators that a professional evaluation is needed.

Difficulty performing daily activities or maintaining your usual level of activity is another sign that your knee may require more advanced care.

How Physical Therapy Can Help

Physical therapy is one of the most effective ways to address knee clicking when it is related to movement dysfunction. A comprehensive evaluation allows providers to assess gait, strength, and joint mechanics.

Treatment focuses on correcting muscle imbalances, improving joint mobility, and building stability around the knee. With the right program, patients can return to activity with improved confidence and reduced risk of future injury.

At Performance Ortho, treatment plans are tailored to each individual, ensuring that both symptoms and root causes are addressed. While physical therapy is typically a piece of many patients’ treatment plans, more advanced interventions may be targeted to stimulate recovery that is in line with your personal recovery and activity goals.

Contact Performance Ortho for More Information

Are you or a loved one suffering from knee pain and seeking non-surgical alternatives? Contact our New Jersey orthopedic clinics in Branchburg, Somerset, Watchung, and Hillsborough. Our experienced team is here to guide you through every step of your recovery with personalized, expert care.