| Leukonychia Totalis (partial or totalis white nails) |
Congenital (leukonychia totalis): autosomal dominant syndrome |
| Terry nails (either all or only proximal 80% of nail bed is white): liver disease (cirrhosis) |
| Half-and-half nails (pink proximally, white distally): renal failure, uremia |
| Leukonychia punctata (white spots) |
Minor trauma to nail cuticle or matrix |
| Transverse striate leukonychia (white lines) |
Muehrcke lines (transverse white lines): hypoalbuminemia |
| Mees lines (transverse white lines): heavy metal poisoning (arsenic), renal failure |
| Green nails | Pseudomonas pyocyanea infection (candidiasis) |
| Blue and brown nails | Medication side effect (quinacrine, chloroquine, minocycline [blue nails], doxorubicin, melphalan, bleomycin,
daunorubicin) |
| Wilson disease |
| Ochronosis |
| Psoriasis |
| Alopecia areata |
| Consider staining (nicotine, potassium permanganate, varnish) |
| Black nails (melanonychia) |
Medication side effects (cyclophosphamide) |
| Melanonychia striata: common in dark-skinned persons; idiopathic or secondary to trauma or chemotherapy |
| Nevus (uniform brown longitudinal streak localized to nail) |
| Melanoma (longitudinal brown-black streak that may encompass entire nail) |
| Hematoma |
| Yellow Nail Syndrome | Lymphedema |
| AIDS |
| Bacterial infection |
| Fungal infection (onychomycosis) |
| Psoriasis |
| Alopecia aerata |
| Cardiopulmonary diseases |
| Red nails (including red and white streaks) |
Darier disease |
| Glomus tumor |