A low red blood cell count can be a sign of: Anemia. Leukemia, a type of blood cancer. Malnutrition, a condition in which your body does not get the calories, vitamins, and/or minerals needed for good health. Multiple myeloma, a cancer of the bone marrow.

What causes your red blood cells to be low?

Missing certain vitamins or minerals in the diet because of not eating enough. Low iron levels in blood. Major organ problems (including severe heart, lung, kidney, or liver disease) Red blood cells (RBCs) being destroyed by the body before they're replaced.

What happens if RBC count is low?

A low RBC count, also known as anemia, can affect the body's ability to transport oxygen and nutrients around the cardiovascular system. It can cause fatigue, dizziness, and heart palpitations. The most common form of anemia is iron deficiency anemia. This can result from blood loss, malnutrition, or kidney problems.