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.
According to what Iâve read, PMS symptoms usually start seven to 14 days before your period. So, any time within that period is average. 14 days before your period means you only have two weeks without symptoms each month, so if youâre having symptoms longer than 14 days, I would encourage you to see your healthcare professional.