Skip to Main Content
Signs & Symptoms Orthopedics

ACL Injury
Signs and Symptoms

Patients with ACL tears often:

  • Hear or feel a pop at the moment of injury
  • Experience immediate swelling
  • Feel as though their knee will give out or is unstable, especially when turning, pivoting, sidestepping and going downstairs
  • Experience lingering instability of the knee

UCSF Health medical specialists have reviewed this information. It is for educational purposes only and is not intended to replace the advice of your doctor or other health care provider. We encourage you to discuss any questions or concerns you may have with your provider.