A nail disease or onychosis is a disease or deformity of the nail. Although the nail is a structure produced by the skin and is a skin appendage, nail diseases have a distinct classification as they have their own signs and symptoms which may relate to other medical conditions.
Nail Disorder
Nail disorders are a large group of conditions that affect the appearance of fingernails and toenails. Nails can reveal a lot about your child's health. Infections caused by bacteria, fungus or viruses, underlying conditions and inherited ailments can all cause abnormalities in the nails.