It is important to note that you could be having a heart attack without feeling discomfort in your chest, as is common in women. A sudden feeling of fatigue for no reason could be a sign that a heart attack is incoming. The heart has to work harder as arteries begin to close, and can make simple tasks feel exhausting. This can result sleeping longer hours at night or feeling like you need to take multiple naps during the day.
Polycythemia is an increased number of red blood cells in the blood. In polycythemia, the levels of hemoglobin (Hgb), hematocrit (Hct), or the red blood cell (RBC) count may be elevated when measured in the complete blood count (CBC), as compared to normal. Hemoglobin levels greater than 16.5 g/dL (grams per deciliter) in women and greater than 18.5 g/dL in men suggest polycythemia.
Polycythemia is a condition that results in an increased level of circulating red blood cells in the bloodstream. People with polycythemia have an increase in hematocrit, hemoglobin, or red blood cell count above the normal limits.Polycythemia is normally reported in terms of increased hematocrit or hemoglobin. Primary polycythemia: In primary polycythemia the increase in red blood cells is due to inherent problems in the process of red blood cell production. 2  Secondary polycythemia: Secondary polycythemia generally occurs as a response to other factors or underlying conditions that promote red blood cell production.