the soft center where new blood cells grow. It causes your marrow to make too many red blood cells so your blood is too thick. You may be more likely to have clots, a stroke, or a heart attack.

Anemia is when you have low levels of red blood cells. When this happens, your organs and tissues have a harder time getting oxygen. You may feel fatigue, weakness, and shortness of breath.

Anemia of chronic disease is caused by long-term underlying health conditions, such as autoimmune disorders, that affect your body’s ability to make red blood cells. If you have anemia ...