Signs and symptoms you have a knee injury or chronic disease associated with knee pain include:

  • Swelling
  • Stiffness
  • Crunching or popping sounds
  • Redness
  • Bruising
  • Joint discomfort
  • Inability to straighten your leg
  • Diminished mobility

Knee pain can range from mild to intense in severity. It might feel like a sharp pain or dull, aching pain. Seek medical treatment right away to prevent a minor knee injury from becoming severe.