Buy shoes when to buy a slightly larger size, pick the afternoon when the feet rise to buy, so that the shoes bought to wear will be looser, will not cause extrusion.
The size and softness of shoes have an effect on corns.
If you wear shoes without insoles or even socks. Putting the foot in direct contact with the shoe is more likely to trigger corns.
You can use Eusubi Zhiqing Cream externally, which will soften the keratin, and you can get rid of corns with long-term use.