Anemia > Fact Sheets > Yale Medicine

anemia Summary Anemia occurs when a low number of RBCs are circulating in the body This reduces the person's oxygen levels and can lead to symptoms such as fatigue,

Anemia is described as a reduction in the proportion of the red blood cells Anemia is not a diagnosis, but a presentation of an underlying anemia Anemia happens when there aren't enough healthy red blood cells in the body It can be caused by many things, including dietary problems, medical treatments