You can hear your knee move because of crepitus, which refers to the sounds joints make, like popping or cracking.
What is Crepitus?
Crepitus is a general term for the sounds that can occur in your joints, especially when they move. It's very common and often not a sign of something serious. According to research, these noises are frequently experienced, especially as we age.
Common Reasons for Hearing Knee Movement:
Many people will hear their knees make sounds at some point. Here's what the reference states:
- Normal Movement: Crepitus can simply be a normal part of how your joints move.
- Age: Popping joints are especially common as people get older.
- Bending: You might specifically notice sounds like knee popping or cracking when you bend your knee.
Why Does Crepitus Happen?
While the exact causes can vary, common reasons include:
- Gas Bubbles: The synovial fluid inside your joints, which lubricates them, may release small gas bubbles that pop as you move.
- Tendons and Ligaments: Tendons or ligaments might snap slightly as they pass over bony structures.
- Irregular Joint Surfaces: Slight irregularities in the cartilage or bone surfaces can create a sound when they move against each other.
Is It Something to Worry About?
Generally, if you have no pain or swelling associated with the noises, there is usually no need to be concerned. It's considered a normal part of life for many individuals. However, it is essential to consult a doctor if:
- You experience pain, swelling or redness in your knee.
- Your movement is restricted.
- The noises are accompanied by other symptoms.
| Symptom | Likely Concern |
|---|---|
| No pain, no swelling | Usually normal |
| Pain, swelling, restriction | See a doctor |
Summary
Hearing your knee move is often due to crepitus, which can be a normal part of joint movement. While it can occur for various reasons, like gas bubbles or tendons moving, it's usually harmless if not accompanied by pain or other issues. Remember to see a doctor if you have concerns or related symptoms.
