Background: Primary dysmenorrhea is a common problem of adolescent girls. It has a high prevalence in Egypt so it is important to evaluate the prevalence of dysmenorrhea and the treatment modalities used to alleviate it. Objective: To evaluate the prevalence of primary dysmenorrhea and its treatment modalities. Methods: This cross-sectional study was conducted on 95 students at four secondary schools in Fayed city from October to November 2017.Data were collected using a predesigned self-administered questionnaire and pain severity was measured by NRS. Results: The prevalence of primary dysmenorrhea was (62%) and most of them had moderate pain (74.6%). There was a low rate of doctor consultation (11.9%). Also, 67.8% of students took Analgesics and 40.7% used complementary (hot water bottles, abdominal massage and hot herbal fluids) to alleviate menstrual pain. Conclusion: The prevalence of dysmenorrhea was high among female students in Fayed city and most of them used over the counter (OTC), analgesics and complementary methods to alleviate pain. Dysmenorrhea is strongly associated with some bad habits. It is important to spread awareness about the causes and treatment of dysmenorrhea to avoid undue sufferings.