Left untreated, it can get worse with age. But by understanding what may cause the condition and what can be done to relieve its symptoms, women with PMDD can feel more in control. While PMDD is not fully understood, many doctors believe it is caused by an imbalance of a natural chemical in the body called serotonin. PMDD is characterized by mood and physical symptoms around a woman's menstrual cycle that are severe enough to mark interference with women's everyday activities or relationships PMDD symptoms appear about a week prior to menstruation and remit following the onset of the menstrual cycle. PMDD usually begins when a woman is in her late teens to mid 20s, although women who seek treatment are usually in their late 20s or early 30s.
Symptoms tend to worsen as women get older.
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