Subungual onychomycosis affects the nail bed and underside of the nail. White superficial onychomycosis causes white spots and flaky patches on top of the nail. Candidal onychomycosis starts near the ...

Toenail fungus is a common nail infection that can cause your toenail to become thick and yellow, or have white spots. While toenail fungus isn’t generally painful, it can be contagious and ...