I finally cured the plantar fasciitis in my right foot, and I'm celebrating. As with back problems, it is all physics, and the medical world handles physics as well a computer booking system created by doctors.
The medical world treats it as an injury to the heel attachment. For my left foot, I was under 40 and spent a lot of the company's money on medical treatments, and special footwear, etc. Never worked. There's a monstrous industry for this crap. Thank god they'll never read this.
If your back goes, you'll blame the last straw, like picking up a sock. That's not it. It's a lifetime of slouching at the computer. Your spine is a marvelous machine of soft and hard pieces. Slouching causes the soft jelly disks to bulge, and it takes years.
But, the game's afoot! Or back to the foot. Medicine concentrates on symptoms, or disease and injury. Physics concentrates on fundamental forces. PF comes from a lifetime of walking like a duck. That was me, my feet stuck out at 45 degrees.
When you walk like a duck, there is a lot of impact on the inside of the heel, but that's not the main problem. It's that you are not pulling the whole system. That big tendon starts to accumulating glued spots, or adhesions. You can feel this if you give the wife a foot massage in the hot tub. A deep thumb pressure feels crunchy. Tendons should not be crunchy, they should be slippery eels in your hands.
ps. never a next part.