Nail fungus in children is very rare, such that a worldwide prevalence of onychomycosis (Nail Fungal Infection) in children under 18 years old is lower than 0.5%. However, in some countries such as Mexico and Guatemala has a higher prevalence of onychomycosis in children – it might be related to a hot climate that leads to humid feet environment where fungi are prone to thrive. Although the prevalence of nail fungal infection increase as you get older, some cases with infants and young children do exist.
As a predisposing factor, genetics may play a role. It is well known that particular kinds of fungi (i.e. T. rubrum) may cause chronic feet disease in several members of the same family due to a genetic predisposition to the infection, such as a deficiency in some components of the immune system.
The most difficult task is a diagnosis since there are different kinds of diagnosis in children depending on its clinical presentation. The important thing is not to underestimate the clinical feature, but also you shouldn’t overestimate onychomycosis in children.
Since nail fungus in children is rare, there are no new data on the treatment of onychomycosis in children, so treatment remains the same. Treatment is usually the same as adults. However, topical drugs are not approved for used in children.