They are not normally a treat, unless they are Nail Tek files, specially developed for soft ‘cancer hit’ nails.
At the Royal Marsden they used to have a manicurist, Francesca, who introduced me to this brand. Yesterday, a friend sent me their latest file – in a smart red case with glittery crystals on the handle. Now when I take it out (three times a day!) to file down hang nails, I don’t feel I have to hide the file!