Anemia is a low level of healthy red blood cells (RBC). RBCs carry oxygen from the lungs to the rest of the body. When red blood cells are low the body does not get enough oxygen. This can cause symptoms such as fatigue, pale skin, or irregular heartbeat.

Aplastic anemia is a type of anemia caused by problems with bone marrow. It can range from mild to severe.

Location of Active Bone Marrow in an Adult
nucleus factsheet image
Copyright © Nucleus Medical Media, Inc.

Aplastic anemia is believed to be caused by the patient’s immune system attacking the bone marrow. It slows down the production of blood cells. In some cases, aplastic anemia is a temporary side effect of a medication. It can be reversed if exposure to the cause is stopped.