I'd say this is the culprit. As someone else mentioned, more weight overall means you're feet could be spreading out like how a rubber tire bulges when you load up a truck/car. Another thing to add to that is the fact you're probably not use to carrying around that weight when you're skating. Add that to the time off because of the apocalypse, and you may feel a bit more unstable on the ice. This may lead you to over tighten your skates to compensate, which will squeeze the sides of the skate in more. It doesn't take much. A few millimetres can make all the difference.between a comfortable skate and one that's crushing your foot.