Premenstrual symptoms getting on your nerves?

For some women premenstrual syndrome (PMS) is a minor monthly annoyance, but for others, more severe symptoms seriously disrupt their lives. However despite the number of women affected, science has yet to offer a full explanation or universal treatment. Now intriguing new findings published in the online open access journal BioPsychoSocial Medicine suggest not only that PMS is tied to decreased nerve activity each month, but also that those with extreme symptoms may have a permanently depressed nervous system.