If this https://www.ourhealthnetwork.com/conditions/FootandAnkle/HalluxRigidusandHalluxLimitus.asp sounds familiar, both of you, don't ignore it. I did, and it was a mistake. I now have a titanium joint in my toe, and it doesn't work all that well. I usually can't run more than 100 yd at a time without severe pain.
Seriously, there are things you can do to help before it gets bad. I did go to a doctor about 5 years before I had to have surgery, and he xrayed the foot and said, "Yeah, you have some arthritis in there, take ibuprofen." And that was it. So that's what I did. Big mistake. There is more you can do. (not sure why this guy was such a genius, but it was before I realized how much you have to take things into your own hands with some medical professionals...)
Anyway, mine is my right foot, too, which is a bit larger than my left (but not quite half size), and my right leg is shorter, as well. SO ... must have something to do with stressing that forefoot a little more. Good luck, go get it checked out. Ask around and find the best foot doctor in the area, then go to him/her and two or three others.
Sigh.
Yeah, the first person who noticed it was a Newton Running guy who was analyzing my gait/feet a few years ago. I've been putting off going to see a doctor because it seems like they never have good news for me!