Fingernails can also turn yellow, if a person wears nail polish for an extended amount of time. Don't assume the discoloration is from the polish, just to be safe. Infection is a possibility, too. Best to have it checkd out by an experienced doctor. Good luck.
bekkit is absolutley right about the fingernail polish. I went to my doctor because my nails were getting a yellowish tinge to them, and they she asked me if I wear nail polish. And that is exactly what it was. She also said because the yellow was more toward the white end of my nails, all is fine. If the yellowing was coming from the cuticle end, then I would need to consider a vitamin deficiency or jaundice. Good luck!
hey ive also found recently that its not my actual nail thats turned yellow, its just the skin underneath...i dont smoke, im a reli clean person and keep my nails clean and i dont really use nail varnish, and when i do its on a natural clear color... and i know it cant be a calcium deficiency because i make sure thati keep a fairly balanced diet, and i take suplements on top just to make sure that im getitng everything that i need... not in an obsessive way but just to make sure that im healthy... what would cause just my fingers to turn yellow?? x