Key Points
Dysmenorrhea (ie, painful menses) is a frequent cause of school absenteeism in girls.Primary dysmenorrhea typically occurs 1 to 2 years after menarche.Common causes of secondary dysmenorrhea including sexually transmitted infections (STIs), pelvic inflammatory disease, endometriosis, outflow tract obstruction, and endometrial polyps or fibroids.A careful history and physical examination are sufficient to diagnose primary dysmenorrhea.Secondary dysmenorrhea may require additional evaluation, including STI testing, imaging studies, and referral to a specialist.