what are causes of very bad anemia
Possible causes of anemia include: 1  Certain medications. 2  Destruction of red blood cells earlier than normal (which may be caused by immune system problems) 3  Long-term (chronic) diseases such as chronic kidney disease, cancer, ulcerative colitis, or rheumatoid arthritis.
Many things can cause a person to become anemic, but there are three core problems that can cause the condition: 1  Excessive blood loss, such as: 2  Post-surgery recovery. Heavy menstrual cycles. 3  Your body is not producing enough red blood cells, or those produced are unhealthy. Common causes are:  Hormonal issues. Chronic disease.