Spoon-shaped nails

Clinically: Koilonychia · also spoon nails, curved nails

dermatological

unverified These explanations are written to be easy to read and have not yet been checked against a source. The ranges and measurement notes on this page show theirs.

definition unverified

Nails that curve upward at the edges enough to hold a drop of water. Rare, and unlike most symptoms here it points fairly specifically at long-standing iron deficiency.

Concave, spoon-shaped nail deformity; uncommon, and one of the few findings that points strongly at a single cause.

Markers associated with this

This symptom is associated with 1 marker in this resource. These are associations, not causes, and they are listed in no particular order. Most people with this symptom have none of these. One association here is unusually specific (Ferritin) -- uncommon, but more informative than the rest when it is present.

low Ferritin · characteristic · rare
Long-standing iron deficiency; uncommon, but points strongly at it when present.