What are causes of low blood count, red and white?

A fellow caregiver asked...

What are possible causes of low blood count, including red and white blood cells, with no previous cancer or treatment?

Expert Answer

Jennifer Serafin, N.P. is a registered nurse and geriatric nurse practitioner at the Jewish Homes for the Aged in San Francisco.

Signs of both a low white and red blood cell count include cancers (like leukemia), hyperthyroidism, bone marrow disorders, aplastic anemia, myelodysplastic syndromes, severe infections, or medication side effects.  If both counts are low, you should be seen by a hematologist to find out what is going on to make your numbers low.