What Causes Pain in the Trapezius Muscle of the Shoulder?

Causes of trapezius muscle pain in the shoulder include the following: 1. It may result from shoulder trauma or adhesive capsulitis (frozen shoulder). 2. Cervical disc herniation cannot be ruled out as a potential cause. If the pain originates from the lateral aspect of the shoulder, apply an ice pack for cold therapy; after 24 hours, topical application of safflower oil may be used for treatment. In daily life, prioritize safety to prevent injury, ensure adequate rest, and avoid excessive physical strain.