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.
10. How long does depression last? If left untreated, various types of depressive disorders can last for months or sometimes years. A major depressive episode is characterized by a set of symptoms that typically lasts for a few months. Seasonal depression, or SAD, usually extends throughout the winter months and continues to improve during spring and summer.