Yellow nails often signal underlying health conditions, ranging from fungal infections to more serious diseases. The shade and pattern of discoloration provide clues about potential causes.
Nails turn yellow due to:
| Type | Appearance | Common Causes |
|---|---|---|
| Uniform yellow | Entire nail is pale yellow | Smoking, aging, psoriasis |
| Yellow with thickening | Nails thicken and curve upward | Fungal infections, trauma |
| Yellow with dark streaks | Black or brown lines in yellow nails | Melanoma, subungual hematoma |
Most commonly, yellow nails result from fungal infections (onychomycosis), affecting 10% of adults. A 2018 study in Journal of Clinical Medicine found 90% of yellow nail cases involved either fungal infection or psoriasis.
Consult a healthcare provider if:
Doctors diagnose the cause through visual examination, nail clippings for culture, or blood tests. Treatment varies by cause but may include antifungal medications or addressing underlying conditions.
I once treated a patient whose yellow nails resulted from years of acrylic nail use - the adhesive had stained the natural nail bed. After removal and proper care, the discoloration cleared within six weeks.
To maintain nail health: