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.
It usually takes about three to six weeks for the inflammation linked to plantar fasciitis to go down, but having a tear in the plantar fascia ligament or a growth in the foot may take anywhere from two to five months in recovery time.
The flu delivers a punch powerful enough that many people want to take to bed for a few days. Again, fever and severe symptoms are strong signs that you're too sick to work and should stay home. The flu usually goes away in seven to 10 days in otherwise healthy people, although they may still have a cough and feel tired when they return to work. Although most people will need a few days off to recuperate, they can go back to the workplace 24 to 48 hours after their temperature has returned to normal.