The final chapter covers how to look after yourself during your period. It begins with why menstrual health education matters, especially for teenage girls, then turns to choosing menstrual products, drawing on the Apple Women's Health Study. Practical hygiene guidance follows, such as how often to change sanitary pads and why handwashing matters. The chapter also covers comfort items for cramps, the importance of iron and vitamin C, staying hydrated and how apps and journals can help you track symptoms and ovulation. It ends by explaining which signs, such as unusually heavy bleeding, severe pain or missed cycles, mean you should see a healthcare professional.