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Background&Objective: Primary dysmenorrhea is one of the common causes of absence from work place and life quality among women. According to some studies, fish oil administration results in production of weaker prostaglandin’s (PG) and reduces the severity of dysmenorrhea. The aim of this study is to experience the efficacy of fish oil on dysmenorrhea, which is a cheap drug and with low side effects. Materials&Methods: In this clinical trial, the students separated into two groups those affected with primary dysmenorrhea by referring to girls' high schools and complete the questionnaires. In the next stage randomly were selected two groups each group included 22 students with primary dysmenorrhea. In first group fish oil capsules and the other group placebo were recommended for duration of two months. These students were evaluated before drug recommendation, at the end of two months treatment and two months afterward. In these three stages pain severity by VAS (Visual Analogue Scale) system and pain duration by Cox scaling system were be recorded in each group. Results: There is not meaningfull statistically difference in the average age, age of menarche, menstrual condition (regular or irregular) and accompaniment with symptoms of PMS (premenstrual syndrome) between fish oil and placebo groups. Before recommendation of capsules the average of pain severity did not have a meaningful statistically difference between two groups. The average pain duration also had similar situation. After two months treatment, the average of pain severity (VAS) in fish oil group was significantly less than which in placebo group (p<0.05). Also the average of pain duration in fish oil group was less than which in placebo group with a statistical difference of (p<0.05). Moreover, two months after the end of treatment the average of pain severity (VAS) and pain duration (hour) had meaningfull statistically difference between fish oil and placebo groups and were less in fish oil group. Conclusion: As compared with placebo, the fish oil capsule after two months of consumption had a significant effect on reduction of pain severity and duration in primary dismenorrhea. Also two months afterward from the end of this clinical trial the effect was more than placebo.

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Background and Objective: The painful menstruation is one of the common disorders of ‎female sexual organ which is experienced by almost fifty percent of the women affected ‎by regular menstrual periods. The primary dysmenorrhea is referred to as the ‎menstrual pain in absence of undetectable pelvic disease which occurs usually during 2 years after first menstruation when ovulation is established. This study was done to investigate the effect of heat and vibration on primary dysmenorrhea. Materials and Methods: This clinical trial study carried out on 75 female students, aged 18-22 years old from Islamic Azad ‎University. Each subject evaluated for two menstrual cycles. At first cycle the participants received the routine pain-relief method. During the second cycle each of them applied combined heat-vibration device for ten minutes during ‎menstrual pain. Data collected using ‎questionnaire and pain visual analog scale and analyzed using SPSS-14, t student and Wilcoxon tests. Results: In contols, pain score was 5.34 and 4.09 prior and after routine intervertion, respectively (P<0.001). Also, in cases pain score significantly reduced from 5.34 to 3.44 after intervention by heat and vibration. In 8% of cases a slight redness was observed. Conclusion: This study showed that heat and vibration is more effective than routine intervention in pain during menstrual cycles.