Q: My toenails have a yellow hue that won't seem to fade. in warm, dark, moist environments, which makes your toes a prime location for fungi.Toe fungus is a fungal infection that can affect the areas on or around your toes such as the cuticles and the skin under and around your nail edges.It can make your toenail change color or get thicker. It can also hurt. Because toes are often warm and damp, fungus grows well there. Different kinds of fungi .Remove fungus on toenails and fingernails with this antiseptic, antibacterial, and anesthetic treatment.