For some women, the two-week luteal phase of their menstrual cycle is not just a hormonal rollercoaster - it's a full-on demolition derby. Premenstrual Dysphoric Disorder (PMDD) is a mental health disorder directly linked to the regular hormonal fluctuations that occur during a cycle. Those affected can experience anger, anxiety, severe depression, and even suicidal thoughts, which then stop shortly after menstruation begins. Two women, Shariya in the US and Janna in Germany, share how PMDD has impacted their lives.

Despite its severity, there's very little scientific research about why PMDD happens, and doctors often miss the signs or symptoms. BBC Health Reporter Ruth Clegg has been reporting on how social media has shifted perceptions of the disorder and led to changes in how doctors screen for symptoms.

If you are affected by any of the issues in this episode, or suffering distress or despair and need support, you could speak to a health professional or an organization that offers support. Details of help available in many countries can be found at Befrienders Worldwide (www.befrienders.org).