Every year when the weather turns warm, I want to wear sandals. I know the sandals will rub my feet in places they’re not used to being rubbed, so I bring along some bandaids or plasters or tape. As I walk, I can soon start to feel the irritation of the rubbing. I let it continue until it’s almost painful, then I stop and put a bandaid on the spot, to protect it from further rubbing that day.
The next day I start without the bandaid and follow the same procedure: walk until almost-pain again, then apply a plaster. After a few days of this procedure, I have developed calluses, and don’t need to use plasters any more.
To get calluses, you need the irritation, but a blister will set you back. If you get a blister, then you have to wait for the blister to heal before you try again.
Nina's Blog 