Skin diseases A-Z Skin diseases L – O Nail abnormalities February 24, 2025 / August 12, 2026 by Dick van Gerwen | Leave a Comment Common Nail Abnormalities and Their Symptoms: Fungal Nails (Onychomycosis) Yellow, brown, or white discoloration of the nail. Thickened, brittle, or crumbly nail. The nail may detach or become deformed. White Nails (Leukonychia) White spots or streaks on the nail. Usually harmless and caused by minor trauma. Sometimes a sign of protein deficiency or certain diseases. […] Read more » Brittle nails Dark discoloration Fungal nails Ingrown nail Leukonychia Melanonychia Nail loss Nail psoriasis Nail thickening Onychocryptosis Onychogryphosis Onycholysis Onychomadesis Onychomycosis Onychorrhexis White nails