There's nothing more disturbing than yellow nails. These can result from a number of reasons like peeling oranges, smoking, or using cheap nail polish.

The best way to get rid of the yellow stains is simply by scrubbing at them with a nail brush and whitening toothpaste. This technique works best for toenails yellowed by dark nail polishes, but it should work well for your fingernails for anything that might turn them yellow.