What is the normal appearance of a healthy nail?

A healthy nail typically exhibits a smooth surface, uniform color, and is free from ridges or spots. This indicates good overall health and proper care. When nails appear smooth, it reflects the presence of sufficient moisture and the absence of damage such as trauma or infections, which can lead to irregularities in texture or pigmentation. Consistent color, typically a shade of pink or beige, suggests that there is good circulation to the nail bed and that the nail is not suffering from any systemic health issues.

The other choices describe conditions that are not characteristic of healthy nails, such as roughness or discoloration, which indicate potential health problems or nail trauma.