12 Surprising Causes of Spoon-Shaped Nails (Koilonychia)
10. Fungal Infections
Fungal infections of the nails, medically termed onychomycosis, can cause changes in nail structure, including koilonychia. Fungal infections often begin as discoloration or thickening of the nail and, if left untreated, may lead to severe deformities. The fungi invade the nail bed and matrix, disrupting the growth of healthy nail tissue. Individuals with compromised immune systems or diabetes are particularly susceptible to fungal infections. Treating the infection with antifungal medications can restore nail health and prevent further complications.