The nail is a specialized keratinous skin tag that grows approximately 2 to 3 mm per month, with a complete replacement achieved in 6 to 9 months. Nail disorders comprise approximately 10% of all dermatological conditions. Furthermore, examination of the nails can also provide insight into more serious systemic manifestations in the form of both subtle and specific changes.

The health and appearance of nails is a very common concern today, as reflected in the growing global cosmetics market, as healthy nails are functionally and cosmetically important to the daily work of men and women.