dermatologic disorders
Overview of Nail Disorders
Introduction
A variety of disorders can affect nails, including Nail Deformities and Dystrophies , Most nail infections are fungal ( Onychomycosis ), but bacterial and viral infections can occur (eg, Warts (verrucae vulgaris) result from human papillomavirus infection and frequently infect the proximal nail fold and sometimes the subungual area. Onychophagia (nail-biting) can help spread this infection. Warts involving these areas are especially difficult to treat. Toenails require special attention in older people and in people with diabetes or peripheral vascular disease; a podiatrist can help avoid local breakdown and secondary infections by assisting in routine nail trimming. 