Nail fungus, or onychomycosis, is typically caused by dermatophyte fungi, but yeast and molds can also contribute. It often develops when fungi enter through small cracks in the nail or surrounding skin, especially in warm, moist environments. Risk factors include poor foot hygiene, walking barefoot in communal areas, wearing tight shoes, and having underlying conditions like diabetes... https://zanaquick.com/blogs/news/what-is-nail-fungus