Abstract: Dimorphic anaemia is a condition characterised by the presence of two distinct populations of red blood cells with different sizes, shapes, and staining characteristics in the peripheral blood. This article presents an in-depth exploration of dimorphic anaemia through a detailed case study. The case study involves a patient who presented with symptoms of anaemia, including fatigue and pallor, and underwent comprehensive diagnostic procedures to identify the underlying cause of dimorphic red blood cell population. The article delves into the aetiology, clinical presentation, diagnostic approach, and management strategies of dimorphic anaemia, while using the case study to exemplify the complexities associated with this condition.