Depending on where the pain is it could be any number of things. I have one Morton’s neuroma in my left foot and had one in my right foot- got that one removed 5 years ago and am still doing just fine other than occasional soreness after riding on cold weather days. If it is a Morton’s neuroma, it feels like a marble under the ball of your foot and it hurts like hell to put weight on that part of your foot, especially if there is anything compressing your toes together. This is actually one of the tests doctors do for it- they look for what is called a Mulder’s click (sp?) where they hold the ball of your foot in their hand and basically wiggle up and down and if it pops, then it is a MN. You can sort of try this yourself, beware it hurts~!!!
I went through a long horrible road getting to the surgery on my right foot. I had my left injected as it wasn’t as big. When they removed the one from my foot, it was 4 mm and I was only 22 at the time. So any age can develop these things.
Even if these symptoms don’t match, get yourself to a good podiatrist pronto and get some great insoles- Dr scholls is good, and so are superfeet which come in a variety of thicknesses.
Good luck!