What nail condition is indicated by a green discoloration on the nail plate?

What nail condition is indicated by a green discoloration on the nail plate?

• A. Bacterial infection
• B. Fungal infection
• C. Psoriasis
• D. Nutritional deficiency

Answer: (A)

Green discoloration on the nail plate indicates a bacterial infection, typically caused by Pseudomonas bacteria. When moisture is trapped under a lifted or damaged nail, these bacteria can grow and produce pigments that color the plate green, a condition often seen as green nail syndrome. This helps explain why the sign points to bacteria rather than other causes. Fungal infections usually cause yellowing or browning with thickened nails, psoriasis presents with pitting and changes in texture or lifting, and nutritional deficiencies tend to dull shine or cause brittleness rather than a green tint. In practice, keep the area clean and dry, ensure proper sanitation, and seek medical evaluation if the green color persists, since bacterial infections may require treatment beyond basic nail care.

Green discoloration on the nail plate indicates a bacterial infection, typically caused by Pseudomonas bacteria. When moisture is trapped under a lifted or damaged nail, these bacteria can grow and produce pigments that color the plate green, a condition often seen as green nail syndrome. This helps explain why the sign points to bacteria rather than other causes. Fungal infections usually cause yellowing or browning with thickened nails, psoriasis presents with pitting and changes in texture or lifting, and nutritional deficiencies tend to dull shine or cause brittleness rather than a green tint. In practice, keep the area clean and dry, ensure proper sanitation, and seek medical evaluation if the green color persists, since bacterial infections may require treatment beyond basic nail care.