Right shoulder and arm pain may be caused by trauma, strain injury, frozen shoulder, cervical spondylosis and so on. 1. Trauma: If the patient is engaged in physical labor for a long time or suffers from fracture caused by impact, resulting in right shoulder and arm pain, if the injury is not treated in time, the condition will worsen dramatically. 2. Strain: if the patient is tired for a long time or performs strenuous activities, resulting in excessive accumulation of lactic acid in the arm muscles, causing right shoulder and arm pain. 3. Frozen shoulder: If the patient is overactive for a long time or has a poor posture, it will lead to chronic injury, which will limit the activity of the shoulder joint and reduce the activity of the muscles, thus causing arm pain in the right shoulder, and it may also lead to spasm of the shoulder muscles. 4. Cervical spondylosis: when the patient’s cervical intervertebral disc degenerative changes, resulting in the soft tissues of the neck, static balance imbalance, stimulation or compression of the cervical nerve roots and blood vessels, resulting in pain in the right shoulder and arm. It is recommended to go to the hospital in time, under the guidance of the doctor to carry out relevant examinations, according to the condition, to take targeted treatment, daily life to carry out scientific life management and functional exercise.