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.
Premenstrual syndrome or PMS is a condition that causes typical physical and psychological symptoms that occur monthly in the week or so before your period. These typical symptoms cause some degree of distress or disruption in your life and then rather abruptly go away by the end of your period. Article.