Using a back and forth motion while filing the natural nail disrupts the plate layer and can lead to what issue?

When filing the natural nail using a back and forth motion, the structure of the nail plate can become compromised. This technique can disrupt the layers of keratin that make up the nail, leading to the risk of damage. Specifically, causing splitting and peeling of the nails is a consequence of this improper filing technique. As the nail layers are disrupted, they can separate and weaken, making the nails more prone to breakage and the development of splits.

In contrast, the other issues listed do not directly relate to the effects of back and forth filing. While nails can become weak if the layers are damaged, the primary immediate result of this filing method is splitting and peeling. Similarly, increased growth and discoloration are not directly associated with the technique of filing itself but rather with overall nail health and care. Focusing on a smooth, consistent filing motion is essential for maintaining the integrity of the natural nail.