Sudden Knee Pain
What Is Sudden Knee Pain?
Sudden knee pain is discomfort that begins abruptly in or around the knee joint. It may follow a twist, pivot, fall, direct blow, or sports play, or appear after a quick change in activity. Ligaments, meniscus, cartilage, tendons, and bone can all be involved. Fast evaluation helps protect the joint and start the right treatment.
What Are the Symptoms of Sudden Knee Pain?
Symptoms can include:
- Sharp or aching pain in the front, back, or sides of the knee
- Swelling or stiffness
- Giving way, locking, or catching
- Difficulty bending or straightening the knee
- Pain with walking, stairs, or squatting
- Bruising after trauma
- Inability to bear weight
A visibly deformed knee, open wound, or knee injury with numbness and severe swelling after high-energy trauma should be evaluated in the emergency department.
What Causes Sudden Knee Pain?
Common acute causes include:
- Ligament sprains or tears, including ACL, MCL, and related injuries
- Meniscus tears
- Patellar (kneecap) injury or dislocation concerns
- Tendon strain or irritation
- Contusion or blunt trauma
- Fracture around the knee
- Acute flare of bursitis or soft-tissue inflammation
How Is Sudden Knee Pain Diagnosed?
Your Express Care provider will review the injury mechanism, examine the knee for swelling, range of motion, and stability, and assess your ability to walk. On-site X-ray may help rule out fracture. MRI or specialist evaluation through CSOG can be arranged when ligament or cartilage injury is suspected.
How Is Sudden Knee Pain Treated?
Treatment may include:
- RICE principles (rest, ice, compression, elevation) as directed
- Activity modification and protected weight-bearing
- Bracing, wrapping, or crutches
- Pain or anti-inflammatory medication when appropriate
- Home exercises or early mobility guidance
- Follow-up with a CSOG sports medicine or knee specialist
- Physical therapy when indicated
When Should You Visit CSOG Express Care for Knee Pain?
Walk-in evaluation is appropriate for sudden knee pain after sports or daily activity, swelling, instability, or difficulty bearing weight when emergency care is not required.
