If your daughter’s complaining of severely painful periods that interfere with her daily activities, you should take her to a gynecologist for an exam (which every girl should have at 18, or whenever they first become sexually active anyways). There are treatments for period pains, so your daughter doesn’t have to face a monthly meltdown. Moreover, the doctor will be able to help diagnose if the pain is more than just period cramps. Severely painful periods, due to a number of conditions such as pelvic inflammatory disease (PID), adenomyosis, endometriosis, fibroids, etc. -- many of which have treatments to reduce symptoms.
The worst thing you can do is brush your daughter’s pain off as PMS -- be sure to take her pain seriously.