What causes shoulder and arm soreness and pain?

Possible causes of shoulder and arm soreness include the following: 1. Muscle strain: Prolonged maintenance of the same posture or engaging in heavy physical labor can lead to muscle strain in the shoulder and arm areas, resulting in soreness. 2. Cervical spondylosis: Degenerative changes or trauma in the cervical spine may compress nerve roots, causing radiating pain in the upper limbs and leading to shoulder and arm soreness. 3. Periarthritis of the shoulder: Soft tissue lesions around the shoulder joint, such as aseptic inflammation, may cause shoulder and arm soreness, possibly accompanied by restricted movement. 4. Fasciitis: Neck and shoulder myofascial fasciitis can also lead to muscle soreness in the shoulder and arm. This condition is often caused by muscle strain, trauma, or exposure to cold. If symptoms persist without improvement, prompt medical consultation is recommended.