A hyperextended knee can take anywhere from a few weeks to several months to heal, depending on the severity of the injury. Mild to moderate hyperextension injuries typically recover within 2 to 4 weeks with proper care at home. More severe cases involving ligament tears (like ACL or PCL injuries) may require surgery and could take 6 months or longer to fully recover.
Healing Time by Severity
- Mild to moderate sprains: Approximately 2 to 4 weeks to heal with rest, ice, compression, and elevation (RICE) and physical therapy as needed.
- Severe injuries with ligament damage and surgery: Recovery can take around 6 months or more.
- PCL injuries specifically may take between 2 weeks to 6 months.
- ACL injuries can require 9 months to a year of recovery post-surgery.
Treatment and Recovery
- Mild injuries are managed with at-home care, including RICE, anti-inflammatory medications, and limited activity.
- Physical therapy to regain strength and range of motion is important in all but the mildest cases.
- Severe injuries with ligament tears may require surgical repair followed by extensive rehabilitation.
General Outlook
Most people with mild hyperextended knees recover fully within a month. Surgery cases have longer timelines but also generally lead to good recovery. Delayed or inadequate treatment may cause complications such as instability or ligament damage. It is advised to seek medical evaluation to determine injury severity and appropriate care.
