Soreness in the right arm is considered to be related to physiological factors, and may also be caused by pathologic factors, such as muscle strain, frozen shoulder, rotator cuff injury, cervical spondylosis, etc. 1. Physiological factors: such as long hours of work, sleep at night when the arm pressure can cause muscle fatigue, soreness, can be reduced through rest. 2. Muscle strain: often lifting heavy objects or doing tired work can cause muscle strain in the arm, soreness and pain, through massage, the symptoms can generally be reduced. 3. Frozen shoulder: adhesion of muscle tissues around the shoulder joint and limitation of activities can cause arm pain and soreness, which can be alleviated by acupuncture, ultrashort wave physiotherapy and rehabilitation exercises. 4. Rotator cuff injury: rupture of ligaments in the shoulder joint may involve the arm, causing pain and soreness, and weakness in lifting the arm. 5. Cervical spondylosis: Nucleus pulposus protrusion or osteophyte compression of nerves can cause arm pain, and in some cases, numbness. If your right arm is sore and does not get better through rest, it is recommended that you go to the hospital in time for examination and treatment.