Well, let's look at it this way. The oldest NBA player is 39. There are maybe 6 NFL players over 40, and they are pretty much all kickers. In baseball, there are perhaps a dozen guys over 40, and they are with a couple of exceptions pinch hitters or relief pitchers. And they are the exceptions. Most athletes are done by 35. Over the hill. There is nobody 46 doing anything in competitive sports (other than golf and even then it's a downhill spiral), because, well, from a physical perspective as applied to competitive athletes, they're old and worn even if they are in great condition FOR THEIR AGE. They can't play with the 20 and 30 year olds because the body just ain't what it used to be - even with the best training, conditioning, and medical care in the world. And the tune is comparatively the same for EVERYONE else. The body slowly but surely wears out as we age, even if we do get in better aerobic or physical condition. The joints, the skeleton, the structure, simply can't repair the physical damage incurred in daily living as fast as that damage occurs. Just can't keep up. Just a fact of life.
But the mind doesn't really know time or age. It is arrogant and egotistical. The mind will push the body to do what it has always done before - until the body responds by saying to the brain, "ouch" - you aren't doing that to me any more. No matter what command you give me, I simply can't do that (at least not without telling you I'm hurt). The brain gains, or should gain, wisdom from this painful communication. Wisdom to see doctors and find out what is wrong. Or wisdom to slow down if medical care cannot repair the problem. Sometimes, the brain, like the child it is, needs to get the message repeated over and over before it sinks in. In children it's called being unruly - in adults it's called stubborness or, pathologically speaking, denial.
The mind should see an orthopaedist, particularly one who specializes in feet. The foot could have an injured ligament, tendon, cartilage, or scar tissue, bone spurs, osteo-arthritis, etc. But if the mind dismisses the proper modern medical care (and massages aren't medical care, nor are those providers who can't prescribe meds or order diagnostic imaging like MRI's), well, it will never know what is causing it, what treatment options are available, won't have a recovery plan, and will likely continue to suffer.