If your knees crack, pop, or make crunching sounds when you move, you’re not alone. These noises, often described as “knee crepitus,” are surprisingly common and can happen to anyone, especially as we age. While knee crepitus is often harmless, it’s essential to understand when it might signal a deeper issue. Let’s explore what crepitus is, what causes it, and how you can address it to keep your knees healthy and strong.

What Is Knee Crepitus?

Knee crepitus refers to the sounds your knees make when bending, straightening, or walking. This phenomenon can include popping, cracking, or crunching noises. Most people experience these sounds occasionally, and in many cases, they’re harmless. However, persistent or painful knee crepitus could indicate an underlying issue requiring attention.

The key to understanding knee crepitus is knowing the difference between normal and concerning noises. If your knees crack without pain, it’s likely due to natural changes in your joints as you age. But if you’re experiencing knee popping and pain, or if your knees make a crunching sound during everyday activities, it’s time to seek professional advice.

What Causes Knee Cracking and Popping?

Several factors can contribute to knee crepitus. Here are some of the most common causes:

1. Air Bubbles in the Joint
   Sometimes, tiny bubbles of gas form within the synovial fluid that lubricates your joints. When these bubbles burst, they can cause a popping or cracking sound. This type of knee crepitus is typically harmless and not associated with pain.
   
2. Tendons or Ligaments Snapping
   As you move, your tendons and ligaments may momentarily shift out of place and snap back, producing a popping noise. This is especially common during activities like squatting or climbing stairs and is usually not a cause for concern.
   
3. Cartilage Wear and Tear
   Over time, the cartilage that cushions your knee joint can wear down, leading to rough surfaces that rub together. This can create a crunching sound in the knee, particularly in individuals with arthritis or other degenerative joint conditions.
   
4. Injured Tissues
   Injured tissues from meniscus tears or other impact injuries can lead to knee ratcheting or getting stuck in a position, which can lead to dangerous falls.
   

How Are Knee Issues Diagnosed?

If your knees make persistent noises or you experience pain, seeking a professional diagnosis is essential. Our knee specialists use a combination of diagnostics to pinpoint the cause of knee crepitus, including:

• Physical Examination: A detailed assessment of your knee’s range of motion, stability, and any associated pain.
• Imaging Tests: X-rays, MRIs, or ultrasounds may be used to identify structural issues or cartilage damage.
• Joint Fluid Analysis: In some cases, analyzing the synovial fluid can help rule out infections or inflammatory conditions.

By identifying the underlying cause of your knee sounds, we can develop a tailored treatment plan to address your specific needs.

Treatment Options for Knee Popping With Pain

Treatment for knee crepitus with pain depends on the cause. For many people, simple lifestyle changes can make a big difference. Here are some common approaches:

• Physical Therapy: Strengthening the muscles around your knee can improve joint stability and reduce crepitus.
• Weight Management: Reducing excess weight can ease the pressure on your knees, especially if cartilage wear is a concern.
• Medications: Anti-inflammatory medications may be recommended to manage pain and swelling.
• Injections: For more severe cases, corticosteroid or hyaluronic acid injections can help reduce inflammation and improve joint lubrication.
• Surgery: In rare cases, procedures like arthroscopy or joint replacement may be necessary to address significant cartilage damage or structural issues.

At SCOI, our specialists work with you to determine the best course of action, ensuring your treatment plan is both effective and minimally invasive.

Take Charge of Your Knee Health

If you have questions about your knee condition, come see a SCOI knee specialist to better understand your knee and any potential problems. You can request an appointment here.