Polycythemia can result from internal problems with the production of red blood cells. This is termed primary polycythemia. If polycythemia is caused due to another underlying medical problem, it is referred to as secondary polycythemia.
PMS can last 1-2 weeks. Premenstrual syndrome (PMS) is characterized by a number of symptoms related to a womanâs menstrual cycle. They occur a week or two before monthly menstruation begins, and ordinarily, they disappear at that time.
Many medical professionals hear the question all the time, how long does a fever last? A fever really does not last more than 2-3 days, unless there is a major underlying cause. It is important to take the individual to the doctor if the fever is extremely high or lasting more than the normal amount of time.