Need some help with periods for F19

First off, this isn't about me, it's about my girlfriend, she has really painful periods, and really painful, now I'm a guy and I don't know if the pain is usually as bad as someone punching your stomach, but she's always had really bad PMS and has a history of PCOS from her mother, dark chocolate doesn't work for her, and neither does warmth, any idea how I can help her? I'm not with her right now physically, and I sadly can't be, but any suggestions would help.