Although your X-ray is normal and you do not have significant pain, the sensation of the knee “slipping” or giving way after an injury may indicate a ligament injury (such as an ACL or collateral ligament sprain) or, less commonly, a meniscal injury. These soft tissue injuries are not visible on X-rays. A detailed clinical examination is necessary to assess knee stability and determine the severity of the injury.
Next Steps
Consult an orthopaedic surgeon for a clinical examination. Until then, avoid sports, running, jumping, and pivoting movements. If the knee remains unstable, develops swelling, or gives way repeatedly, an MRI may be required to evaluate the ligaments and menisci.
Health Tips
Follow the RICE protocol (Rest, Ice, Compression, Elevation) for the first 48–72 hours. Seek immediate medical attention if you are unable to bear weight, the knee locks, or you develop significant swelling or increasing pain.