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Objective: To compare differences in self-reported musculoskeletal pain before and after receiving rapid acupuncture for pain at an outpatient emergency department.Methods: Exactly 102 patients presenting to the emergency room of the Hospital Servidor Publico Estadual in Sao Paulo,Brazil,participated in this before-and-after study.All participants had musculoskeletal pain and were treated with the technique proposed by Marques Filho.This emergency acupuncture involved inserting a needle at a point defined by traditional Chinese medicine and applying intense stimulation for 10 s;no more than two points were used on any individual patient.Pain was measured using a numerical visual scale before and immediately after the procedure.Results: Participants in this study were mostly women (78％),had a college degree (47％) and were below the age of 60 (56％).The most common region of pain was the lower back (31％),and the most common type of pain was acute and exacerbated chronic pain.The meridians most commonly involved were the eight extra meridians (40％),and the points most often used for treatment were Houxi (SI3),Shenmai (BL62) and Zulinqi (GB41).Almost all participants reported a decrease in pain intensity,independent of sex,education level,pain site and pain type (acute/chronic;P ＜ 0.05).At the end of the session,only 4％ of the participants reported a desire for allopathic medication.Conclusion: This emergency acupuncture technique for analgesia appears to reduce musculoskeletal pain.Trial registration: Brazilian Registry of Clinical Trials (http://www.ensaiosclinicos.gov.br/) with No.RBR-8dmfjf.