To get rid of yellow stains on fingernails, buff out the discoloration with a drop of lemon oil or lavender oil, suggests Allure Magazine, or brush away stains with a toothbrush dipped in Clorox diluted with water, recommends podiatrist Suzanne Levine. Brushing away yellow stains with a peroxide toothpaste may also help, notes InStyle Magazine.
Try removing yellow stains on fingernails by soaking hands in a bowl of freshly squeezed lemon juice. Follow up the soak by scrubbing the nails with a toothbrush afterward, according to About.com. Another solution may be to soak nails in a hydrogen peroxide mixture with four parts water to one part hydrogen peroxide for 10 minutes to remove yellow stains from the nails, as suggested by Allure's book, "Confessions of a Beauty Editor."
Denture cleaning tablets can also help to remove yellow stains, according to Marie Claire's "Hair & Makeup" book. Drop two denture cleaning tablets in a glass of water filled one-fourth of the way to the top, and soak nails in the solution. Follow up the soak by scrubbing nails with a nail brush.
When a nail is plagued by a fungal infection, it can also appear to be yellow and cracked, according to WebMD. Treatments to remove the yellow appearance may include antibiotics prescribed by a physician or over-the-counter antifungal ointments.