When filing the nail, which direction should the filing be done?

Filing the nail from the corner to the center is the recommended technique because it helps to maintain the nail's strength and prevents splitting or breaking. This directional filing allows for even shaping and reduces the risk of damaging the delicate layers of the nail. By starting at the corners and moving towards the center, you create a smoother, more polished edge. The technique promotes a natural curve of the nail while ensuring that the filing pressure is applied consistently, reducing the likelihood of the nails becoming weak or prone to chipping.

Other filing techniques, such as filing back and forth or in a circular motion, can create heat and friction that may weaken the nail structure, while starting from the center can lead to uneven edges and potential splitting. Therefore, filing from the corner to the center is the best practice for maintaining healthy nails.