Gavin Pay wrote:
...Would it be possible to feel the difference between a snapping tendon and the 'knuckle crack' type of click? Like feeling or seeing the tendon move under the skin as opposed to just moving with a click?
My foot (or sometimes both feet) have clicked (cracked) all my life, and I am in my 40's. No effect on my feet whatsoever, so far, & I wouldn't worry about it.
There is a difference between snapping tendon & cracking. The snapping tendon, which I have had happen to the bottoms of the feet, can be painful - & not a good pain - but it is quick. You can feel it move under the skin.