Common causes of yellow toenails include excessive nail polish use and fungal infections. However, yellow toenails can sometimes be a sign of a more serious underlying health condition ...

In some people, the yellow nails will resolve on their own. Nail polish can also cause toenail discoloration if the polish penetrates deep into the keratin layers in the nail. The discolored nail ...

If you have nail fungus, your toenail color might be: white yellow reddish brown green black ... When you apply nail polish to the surface of your nail, it can penetrate and stain deeper layers ...

There’s nothing in traditional nail polish that will directly harm your fingernails or toenails ... Thickened, crumbly, yellow or misshapen nails can signal a fungal infection, Dr. Rubin ...