If your doctor orders blood tests for you, a laboratory technician will carefully draw a small amount of blood from a vein in your arm, which then will be tested in the laboratory. Blood tests that …

If your doctor orders blood tests for you, a laboratory technician will carefully draw a small amount of blood from a vein in your arm, which then will be tested in the laboratory. Blood tests that might be used include the following:

  • Complete blood count (CBC), which could point to problems such as infection or inflammation
  • Erythrocyte sedimentation rate (also called sed rate), a measure of inflammation that may suggest infection. The presence of inflammation may also suggest some forms of arthritis or, in rare cases, a tumor.