Iron deficiency anaemia is the most common nutritional deficiency disorder in children and is worldwide in distribution. It is characterised by fatigue, weakness, pallor and koilonychias. Thus oral physician play an important role in diagnosis and thereby prevention of anaemia, as oral manifestations may be the earliest feature of the condition. The purpose of this article is to present a case of iron deficiency anaemia of unknown cause in a 16 year old female child.