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Why Are Your Nails Turning Yellow? 6 Causes and Prevention Tips You Might Not Know

Yellow nails? Don’t panic — you’re not alone.
Discoloration doesn’t just affect your looks; it can signal deeper issues with your nail health. Here’s what might be causing it — and how to bring your nails back to their natural, healthy glow.

Cause 1: Chemicals from Nail Polish

Dark nail polish shades, though beautiful, can stain your nails — especially if you skip the base coat or use low-quality products.

Prevention: Always apply a base coat before painting, choose polishes free from harsh chemicals like formaldehyde and toluene, and let your nails “breathe” for a few days each week.

Cause 2: Fungal Infection

If your nails appear thick, discolored, or misshapen, you might be dealing with a nail fungus. Fungi thrive in warm, moist environments like between toes or under nail beds.

Prevention: Keep nails clean and dry, avoid sharing nail tools, and wear sandals in public areas such as pools or gyms.

Cause 3: Smoking

Nicotine doesn’t just affect your lungs — it can also stain your nails yellow or brown.

Prevention: The best solution is to quit smoking, but if not, wearing gloves while smoking can reduce staining.

Cause 4: Underlying Health Issues

Sometimes, yellow nails can signal health problems such as respiratory conditions, liver or kidney issues, or sinus infections.

Prevention: If your nails remain yellow despite proper care, consult a dermatologist or doctor to check for internal causes.

Cause 5: Moisture and Environment

Frequent exposure to water or cleaning chemicals can weaken your nails and cause discoloration over time.

Prevention: Use rubber gloves when cleaning or washing dishes, dry your nails thoroughly, and apply nail oil regularly to retain moisture.