If the trimmed toenails are rough, what should be used to file them?

Using a nail rasp is the most appropriate choice for filing rough trimmed toenails. A nail rasp is specifically designed for shaping and smoothing the edges of thicker nails, such as toenails. It has a coarse texture that effectively removes roughness and can help refine the nail shape without causing damage to the nail plate.

In the context of nail care, a rasp is particularly useful for thick or rough surfaces because it provides the necessary grit to smooth out imperfections effectively. It’s common for toenails to need this type of attention due to their natural thickness and the potential for rough edges after trimming.

The other tools mentioned have different uses: a nail file generally has a finer grit designed for finishing touches rather than heavy filing, a buffer is used for polishing and shining rather than shaping, and scissors are meant for cutting rather than smoothing rough edges. Therefore, employing a nail rasp is the best practice for addressing rough toenail edges.