causes of koilonychia
Here are some causes of Infected Koilonychia: 1  trauma. 2  illness. 3  malnutrition. or any major metabolic condition,  chemotherapy or other damaging event.
Koilonychia can also be caused by medical conditions created by unbalanced diets, problems with absorption, inadequate intake of nutrients, inability to digest nutrients, digestive issues, or anything that is capable of hindering the proper development of nails, nail biting included.