In the context of nails, what issue arises from incorrect e-file usage?

Incorrect usage of an e-file can indeed lead to grooves in the nail. E-files, or electric files, are commonly used for filing, smoothing, and shaping nails. If not used properly, they can create uneven pressure on the nail surface or be held at the wrong angle, which can cause the nail to develop grooves or ridges. These imperfections not only affect the aesthetic appearance of the nails but can also weaken them over time, potentially leading to more serious nail damage.

It’s important to note that the other issues, such as nail fungus, breakage, and discoloration, relate to different problems associated with nail care and maintenance. Nail fungus typically stems from improper sanitization of tools, moisture retention, or pre-existing conditions, while nail breakage is more often linked to physical trauma or the condition of the nail itself. Nail discoloration can result from various factors, including exposure to certain chemicals or health issues, but does not directly relate to the specific technique of e-filing. Therefore, grooves in the nail are the most direct and relevant concern associated with improper e-file usage.