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 (PMS) is a condition that affects a womanâs emotions, physical health, and behavior during certain days of the menstrual cycle, generally just before her menses. PMS symptoms start five to 11 days before menstruation and typically go away once menstruation begins. The cause of PMS is unknown.