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Also, what does fingernail fungus look like?
Nail fungus is a common condition that begins as a white or yellow spot under the tip of your fingernail or toenail. As the fungal infection goes deeper, nail fungus may cause your nail to discolor, thicken and crumble at the edge. If your condition is mild and not bothering you, you may not need treatment.
Correspondingly, can onychomycosis go away on its own?
Fungal infections of the toenails — also known as onychomycosis — don't go away on their own, and if left untreated, the fungus will spread and can eventually destroy the nail.
An early stage fungal toenail infection will show up with white lines or spots evident on the surface of the nail. The nails will become thick, more yellow, and brittle.