Premenstrual syndrome (PMS) is defined as a combination of both physical and mental symptoms that occur during the luteal phase of menstrual cycle. The luteal phase begins after ovulation and ends when one gets her period — typically lasting near about 2 weeks.
During that time, many patients experience mild to moderate mood changes. However, if symptoms are severe, it could indicate a more serious disorder, such as premenstrual dysphoric disorder (PMDD). Anxiety is the hallmark symptom in PMS.
Even after so many investigations, experts do not have a concrete understanding of premenstrual symptoms and conditions. However, most believe that PMS symptoms, including anxiety, arrive in response to changing levels of oestrogen and progesterone. Levels of these reproductive hormones rise and fall dramatically during the luteal phase of menstruation. Practically, woman’s body prepares for pregnancy by increasing hormone production after ovulation. When an egg does not fertilize and implant, those hormones get decreased and one gets her period. This hormonal rollercoaster simultaneously affects neurotransmitters in the brain, such as serotonin and dopamine, which are associated with mood regulations. This may partially explain the psychological symptoms, such as anxiety, depression, and mood swings, that happen during PMS.