At the time of an ACL injury, signs and symptoms may include:

  • A loud "pop" sound
  • Severe pain and inability to continue activity
  • Knee swelling that usually worsens for hours after the injury occurs
  • A feeling of instability or "giving way" with weight bearing

When to see a doctor

Most people seek immediate medical attention after an ACL injury.

Jan. 04, 2013

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