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The BR is described anatomically and functionally, then linked to triggers such as repetitive overuse, sudden overloading, and direct trauma. Characteristic symptoms include sharp pain during activity and aching at rest along the lateral elbow to the forearm and hand, with tightness. Diagnostic reasoning emphasizes differential diagnosis from lateral epicondylitis, radial tunnel syndrome, de Quervain’s tenosynovitis, carpal tunnel syndrome, trigger thumb, writer’s cramp, and cervical radiculopathy. Conservative care includes RICE, medication, stretching, and injection options such as myofascial or botulinum interventions.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/brachioradialis-muscle-pain-a-common-source-of-underdiagnosed-or-misdiagnosed-forearm-pain/433805/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/brachioradialis-muscle-pain-a-common-source-of-underdiagnosed-or-misdiagnosed-forearm-pain/433805.png","ImageObject",300,407,{"name":92,"@type":93},"Liam","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-08","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What activities commonly lead to brachioradialis (BR) muscle pain?","Question",{"text":112,"@type":113},"BR pain commonly follows repetitive overuse or sudden overloading, including daily actions such as putting a cup back down, opening doors, shaking hands, and using a screwdriver or hammer.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What symptoms suggest BR muscle pain rather than other causes?",{"text":117,"@type":113},"Typically, BR muscle pain causes sharp, shooting pain during activity and aching pain at rest along the lateral elbow through the forearm and into the thumb and index finger, often with tightness.",{"name":119,"@type":110,"acceptedAnswer":120},"Which conditions must be considered in the differential diagnosis?",{"text":121,"@type":113},"Differential diagnosis includes lateral epicondylitis (tennis elbow), radial tunnel syndrome, de Quervain’s tenosynovitis, carpal tunnel syndrome, trigger thumb, writer’s cramp, and cervical radiculopathy.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},433805,1790779778,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},8796095461564,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Korean J Pain 2026;39(1):36-50 [https://doi.org/10.3344/kjp.25139](https://doi.org/10.3344/kjp.25139)[ ](https://doi.org/10.3344/kjp.25139)[pISSN 2005-9159](pISSN 2005-9159), eISSN 2093-0569  \n| \u003Cbr>Review Article\u003Cbr>Brachioradialis muscle pain: a common source of underdiagnosed or misdiagnosed forearm pain\u003Cbr>Kyung-Hoon Kim\u003Cbr>Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea |  |\n| --- | --- |\n| \u003Cbr>ABSTRACT\u003Cbr>The brachioradialis (BR) muscle is a long, large, fusiform muscle on the lateral side of the forearm. It originates from the lateral distal humerus and inserts to the base of the styloid process of the radius. The function of the BR muscle is to flex the elbow, especially with the hand in a neutral position, to pronate and supinate the forearm, and to support wrist extension, especially gripping or picking up something. BR muscle pain arises from repetitive overuse, sudden overloading, and direct blow. Common painful daily activities include putting a cup back down after drinking, opening doors, shaking hands, and using a screwdriver or hammer. The two most common symptoms of BR muscle pain are a sharp and shooting pain during activity and an aching pain at rest from the lateral elbow through the forearm, back of the hand, and thumb and index finger, as well as tightness. Differential diagnosis considers lateral epicondylitis (tennis elbow), radial tunnel syndrome, de Quervain’s tenosynovitis, carpal tunnel syndrome, trigger thumb, writer’s cramp, and cervical radiculopathy. BR muscle pain is common in patients with subacromial impingement syndrome. Basic conservative treatment includes rest, ice, compression, and elevation (RICE), as well as medication. Stretching exercise for the BR muscle is helpful. Injection techniques, such as myofascial injection or botulinum muscle injection, are also recommended. BR muscle pain is one of the common sources of underdiagnosed and misdiagnosed forearm pain.\u003Cbr>Keywords: Differential Diagnosis; Elbow; Fascia; Forearm; Intramuscular Injections; Myalgia; Radiculopathy; Shoulder Impingement Syndrome; Spasm; Tennis Elbow; Thumb; Wrist. |  |\n| INTRODUCTION\u003Cbr>Chronic forearm pain disrupts daily life, including brushing teeth, face washing, eating food, or opening doors. One of the most common sources of forearm pain is considered to be tennis elbow (lateral epicondylitis) or golf elbow (medial epicondylitis) . If the pain is localized to the lateral forearm and tenderness is localized on the lateral epicondyle, tennis elbow is suspected. | However, a hidden, underdiagnosed brachioradialis (BR) muscle contraction should be considered an important source of the forearm pain even though the prevalence is not proven. A prolonged, excessive contraction of the BR muscle elicits pain and tenderness of the lateral forearm from the lateral surface of distal humerus above the lateral epicondyle (its origin), through the BR muscle belly, to the styloid process of the radius (its insertion) [1] . Differential diagnosis with common disorders is need- |\n\nReceived April 18, 2025; Revised August 28, 2025; Accepted September 4, 2025 Handling Editor: Yeon-Dong Kim  \nCorrespondence: Kyung-Hoon Kim  \nDepartment of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, 20 Geumo-ro, Mulgeum-eup, Yangsan 50612, Korea  \nTel: +82-55-360-1422, Fax: +82-55-360-2149, [E-mail:](E-mail: pain@pusan.ac.kr)[ pain@pusan.ac.kr](E-mail: pain@pusan.ac.kr)  \nThis is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ([https://creativecommons.org/](https://creativecommons.org/)[ ](https://creativecommons.org/)[licenses/by-nc/4.0](licenses/by-nc/4.0)), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.  \nCopyright © The Korean Pain Society  \ned from the origin, muscle belly, and insertion. First of all, lat","cbCaiim3ULtXtLwM","https://ap.wps.com/l/cbCaiim3ULtXtLwM","pdf",3364417,15,"English","# Abstract\n# Introduction\n# Differential Diagnosis\n# Anatomy and Function\n# Pathophysiology and Diagnosis\n# Commonly Combined Disorders\n# Treatment","[{\"question\":\"What activities commonly lead to brachioradialis (BR) muscle pain?\",\"answer\":\"BR pain commonly follows repetitive overuse or sudden overloading, including daily actions such as putting a cup back down, opening doors, shaking hands, and using a screwdriver or hammer.\"},{\"question\":\"What symptoms suggest BR muscle pain rather than other causes?\",\"answer\":\"Typically, BR muscle pain causes sharp, shooting pain during activity and aching pain at rest along the lateral elbow through the forearm and into the thumb and index finger, often with tightness.\"},{\"question\":\"Which conditions must be considered in the differential diagnosis?\",\"answer\":\"Differential diagnosis includes lateral epicondylitis (tennis elbow), radial tunnel syndrome, de Quervain’s tenosynovitis, carpal tunnel syndrome, trigger thumb, writer’s cramp, and cervical radiculopathy.\"}]","Brachioradialis muscle pain: a common source of underdiagnosed or misdiagnosed forearm pain | PDF",1790665565,38]