COLOR: Yellow Nails If your nails have taken on a yellow tint (like mine sometimes do), it may be your lungs crying out for help ... or just evidence of polish color preference. "While yellow nails can be a sign of lung disease or nicotine stains from smoking, more often, it's discoloration from using dark nail polishes," Steel says. Phew. But if you notice an unpleasant odor, you could have a fungal infection. Make an appointment with your doctor asap -- a simple blood test can rule out illnesses that cause yellowing. If it's just a matter of your polish staining your nails, switch to one of these lighter polish colors. And if you must use dark polishes, always use a base coat, like this OPI one, to protect your nail from direct contact with the pigment.
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