This book is an essential resource for medical practitioners who use ultrasound technology to diagnose and manage musculoskeletal pain, with a particular focus on clinical syndromes of the upper extremity. Moving beyond the traditional emphasis on normal sonoanatomy, it introduces diagnostic criteria for musculoskeletal disorders from various ultrasound perspectives, offering a comprehensive approach to both assessment and intervention. The chapters cover a wide range of conditions, including adhesive capsulitis, subcoracoid pain, and the complexities of the axillary region. Readers will gain insights into lateral and medial elbow pain, De Quervain's disease, and carpal tunnel syndrome. The authors, experienced clinicians in the field, provide detailed guidance on ultrasound-guided injection techniques, equipping practitioners with practical skills for pain management. This book stands out for its strong clinical perspective, enhancing musculoskeletal anatomy knowledge and offering structured protocols for diagnosis and treatment. Designed for physicians across multiple specialties-including physical medicine and rehabilitation, sports medicine, orthopedics, rheumatology, and primary care-this book serves as a comprehensive reference for those seeking to expand their expertise in ultrasound applications for musculoskeletal conditions. It is also a valuable addition to medical institutions and training programs focused on musculoskeletal health. By delivering a thorough exploration of ultrasound-guided techniques, this volume empowers practitioners to enhance patient care and optimize treatment strategies for musculoskeletal pain.