Pernicious anaemia is a rare condition which is classed as an autoimmune disease. It is most frequently diagnosed in those over the age of 60, but can occur at any age. It presents with variable symptoms, many of which are shared with those of other diseases, making the condition difficult to diagnose, leading to missed diagnosis and a greater risk of
complications. This article gives an overview of its diagnosis, management, and  complications, with the aim of helping general practice nurses (GPNs) and non-medical prescribers recognise symptoms and get early treatment, reducing the risk of long-term adverse effects and improving quality of life for all those affected by this complex disease.