A high blood count (above 30000 cells per micro-liter) indicates is not a specific disease by itself but indicates infection, systemic illness, inflammation, allergy, leukemia and tissue injury caused due to burns. The count of white blood cells also increases when certain medicines like antibiotics or anti-seizure drugs. Smoking and too much of mental stress also increases the count of the white blood cells in the body. Also, once the count of white blood cell is on the higher side, the risk of cardiovascular mortality also increases. It turns into a vicious circle. On the other end, a low count of white blood cells indicates viral infections, low immunity and bone marrow failure. A severely low white blood count that is the count of less than 2500 cells per micro-liter is a cause for a critical alert and possess a high risk of sepsis.
It is very important to undergo annual physical checkups and insist on a complete blood count analysis, especially as you grow older. Diseases like cancer if detected early can be treated very easily when compared to detecting it at an advanced stage.