What should you know about white nails and toenails?

Small white marks can appear after minor damage to the nail as it grows. Broader or persistent whitening may occur with fungal infection, while nail psoriasis can cause pits, ridges, lifting, or debris beneath the nail. Nail polish, removers, and repeated pressure from footwear can also change the surface. Whether one nail or many are involved, and whether the skin around them is inflamed, gives a clinician useful context.

Remove polish gently, keep nails trimmed and dry, and wear footwear with enough room for the toes. Avoid scraping the surface or sharing clippers. Photograph the nails in natural light and note any recent injury, manicure, new shoes, rash, or medication. A clinician may examine the nail and take a sample before recommending treatment; oral antifungal treatment is suitable only for selected confirmed infections.

Book a medical assessment when whitening persists, spreads, affects several nails, or comes with thickening, lifting, pain, or crumbling. Seek prompt care for redness, warmth, swelling, discharge, or a wound around the nail. A rapidly changing single nail also deserves review, particularly when the cause is unclear. These features help distinguish a minor growth change from a condition needing treatment.

Ask whether the appearance is more consistent with injury, nail fungus, or nail psoriasis, and whether a sample is useful. Discuss nail care while it grows out, signs of infection, and whether any prescribed medicine needs monitoring because of your other health conditions or medicines.