Colloidal Silver for Fungal Infections for external treatment n Nail Fungal Infections Nail fungal infections - also known as "onychomycosis" - are a very common type of nail disease. In fact, among all nail-related conditions, experts estimate that fungal infections occur with an incidence ranging from 30% to 50%. Technically, the term "onychomycosis" is used to indicate this nail disorder, triggered by microorganisms called fungi: these fungi, molds, or yeasts cause the infection, which can remain confined to a single nail or can also affect others. TREATMENT: Spray directly on the affected nails, once in the morning and once in the evening.