I had some tenderness on the ball of my left foot so I thought it was a muscle pull but then after a few days…

I had some tenderness on the ball of my left foot so I thought it was a muscle pull but then after a few days I was starting to think that maybe I had stepped on something even though I don't remember any painful incident like stepping on a bee or piece of glass. I have been walking barefoot for about 15 years (which has been very good for my foot health and overall health) although mostly on grass/sand/dirt in the warmer months and inside my house year round but I did walk