A crunchy sound in your knee, known as crepitus, usually results from rough cartilage causing bones to rub together more than they should.
Understanding Knee Crepitus
The cartilage in your knee joint acts as a cushion, allowing smooth movement between bones. Over time, or due to injury, this cartilage can wear down or become damaged. This damage leads to the bones rubbing against each other, producing a crunching or crackling sound. Think of it like the sound of gravel shifting.
Common Causes of Knee Crepitus:
- Cartilage damage: The most frequent cause; This can be from osteoarthritis, injury, or overuse. The reference states that this rough cartilage directly results in less smooth bone movement within the joint.
- Ligament injury: Damaged ligaments can destabilize the knee joint, contributing to abnormal bone movement and crepitus.
- Tendinitis: Inflammation of the tendons surrounding the knee can also cause crepitus.
- Loose bodies: Fragments of cartilage or bone within the joint can create a crunching sound as they move.
When to Seek Medical Attention:
While knee crepitus is often benign, you should consult a doctor if:
- The crunching sound is accompanied by pain, swelling, or locking of the knee.
- The crepitus is new or suddenly worsened.
- You have experienced a knee injury.
The crepitus is typically heard when bending the knee, for example, squatting, using stairs, or standing up from a seated position, as the reference notes.
Self-Care and Management:
- Low-impact exercise: Maintaining muscle strength and flexibility around the knee can help improve joint stability and reduce stress on the cartilage. Examples include swimming, cycling, and walking.
- Weight management: Excess weight puts extra stress on the knee joints, accelerating cartilage wear.
- Physical therapy: A physical therapist can guide you through exercises to strengthen your muscles and improve your range of motion.
