IMAGE PROVIDED BY:
Odilon Dimier / Photoalto
SOURCES:
WebMD: Period Problems: What They Mean and When to See the Doctor
The American Congress of Obstetricians and Gynecologists: Dysmenorrhea
National Institutes of Health (Medline Plus): Painful Menstrual Periods
The National Women’s Health Information Center: Menstruation and the Menstrual Cycle