Pitting of the nails, resembling a number of small dents
, could be due to a skin condition known as psoriasis. Distorted nails can also be due to fungal infection, hardening of the arteries and vitamin deficiency. the other possibility is of koilonychia. It is an abnormal shape of the fingernail. The nail has raised ridges and is thin and curved inward. This disorder is associated with iron deficiency anemia.