What is a Nail Fungal Infection? A nail fungal infection, also referred to as onychomycosis, is a very common ailment that affects many adults and a large percentage of the geriatric population. It is caused by fungus, most often pathogens known as dermatophytes, that infect the tissue beneath the nail. It can affect either the fingernails or toenails, but it is much more common on the toes. When left untreated, it can lead to emotional and physical problems and even more serious issues like severe immune system infections. [Read more…]