Knee instability can be caused by different issues, including ligament tears, arthritis, and nerve damage. It may be the only symptom you have, or your knee may also hurt, pop, bruise, or swell.
Source: Verywell health
Knee instability can be caused by different issues, including ligament tears, arthritis, and nerve damage. It may be the only symptom you have, or your knee may also hurt, pop, bruise, or swell.
Source: Verywell health