Soreness in the right arm may be a harbinger of frozen shoulder, muscle soft tissue damage, and neuropathy. 1. Frozen shoulder: If you have right arm pain, it may be frozen shoulder. Frozen shoulder is mainly due to adhesion contracture of ligaments around the shoulder joint, and there may be soreness and pain around the shoulder joint in the early stage, which will be manifested as limitation of shoulder lifting function in the later stage. 2. Muscle soft tissue injury: if muscle soft tissue injury, mainly for the right arm muscle strain. If often repeated exercise, cold, will induce soft tissue muscles, aseptic inflammation, manifested as diffuse pain, accompanied by aggravation after activity. 3. Neuropathy: If you suffer from nerve root cervical spondylosis, etc., it will compress the nerves of the right arm and cause pain in the right arm, accompanied by clinical symptoms of numbness and weakness. If right arm pain occurs, it is recommended to consult a doctor in a timely manner to clarify the cause and follow the doctor’s instructions for treatment.