Seems fairly rare to hear of someone having a knee, etc that bothers them for years provided it’s been properly treated. But hear about “bad backs” that people fight for decades.
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Actually knees are quite problematic. There’s a slippery coating where the bottom of your upper leg and top of your lower leg face each other. That slippery coating can get worn away over time and it doesn’t come back, (think the eraser on a wooden pencil). People have knee replacement surgeries all the time. Can’t replace the back.
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