OK, so my left has always been the side where I've had issues, if I've had any. Also, shoes that fit fine on my right foot often rub the top of the knuckle or whatever at the base of my big toe on my left. When I wear some of my shoes, I can feel just a little tenderness in that area until I've run for a few miles.
I like to nip injuries in the bud if I can, so I've been trying to figure out how to fix this problem. I finally realized I have a small dorsal bunion that probably has been developing for years on that foot. I also realized that I have a touch of hallux valgus on that side, which most of you probably know means that my big toe points out a bit toward the other toes. I got around to getting those Correct Toes things, and I've been wearing just one of them on my left foot. I cut off part of it so that it's now down to the first two spacers. I didn't see any need to have my pinky toe sticking out like it did before. It's very comfortable and I've been wearing it all day and during runs. I can report that my feet look more symmetrical, and that tenderness has gone away in the shoes where it used to appear.