Causes of Knee Popping or Snapping
Source: Verywell Health
Knee popping, snapping, cracking, or crunching noises are usually harmless and may simply be the consequence of aging joints. But they could also be an indication of a serious injury, such as a torn meniscus, or an early sign of knee arthritis. This is especially true if the noises are accompanied by pain or the loss of joint mobility.
