Koilonychias

Koilonychias (noun)

Definition:
Koilonychias, also known as spoon nails, refer to nails that curve inward, creating a concave or spoon‑like shape.

Origin:
The term stems from Greek: koilos meaning “hollow” and onyx meaning “nail.”NCBI , Dictionary.com

Key Characteristics

• Nails look scooped or concave, sometimes deep enough to hold a droplet.
• They feel thin, soft, and brittle.

Common Causes

• Iron‑deficiency anemia is the most frequent cause of spoon nails.
• Other possible causes include vitamin B deficiencies, malnutrition, autoimmune disorders (like lupus or psoriasis), thyroid issues, and trauma.
• In infants, spoon nails may be congenital and often resolve naturally with age.

What It Means

Koilonychias usually signal an underlying health issue—not a health problem on its own. They offer a visible clue that warrants further check‑ups.

Diagnosis & Management

• Diagnosis often includes a physical exam and blood tests (e.g. iron levels, CBC).
• Addressing the root cause—such as correcting iron deficiency—can help nails recover over time. It may take 4 to 18 months for nails, especially toenails, to grow back healthy.
• Simple nail care practices—like keeping nails short, clean, and moisturized—support healing.