Overuse of buffing and corn rasp

[Cpats_]

Question is in the title really, can someone inform me on what overuse of buffing on the toes can cause? And what overuse of corn rasp can do on the feet? Thank you x

 

[blossom]

I'd imagine the first will thin the nail and the second will make the skin sore x

 

[Opinaillove]

What blossom said