Koilonychias

Koilonychia, also known as spoon nails, is a condition where the nails become concave or spoon-shaped. This deformity is characterized by the nails appearing flat or even indented, with thinner edges that curve upwards. Koilonychia is often associated with iron deficiency anemia, as well as other conditions such as hemochromatosis, Raynaud’s disease, and malnutrition. It can also be a sign of injury or trauma to the nails.