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.
Severe symptoms. Women who have severe premenstrual mood swings, depression, irritability, or anxiety (with or without physical symptoms) are said to have premenstrual dysphoric disorder (PMDD). Symptoms generally go away within the first 3 days of menstrual bleeding. This severe type of PMS isn't common.