The pain in the right arm is caused by physiological factors such as overwork and disease factors such as frozen shoulder, cervical spondylosis, trauma to the right shoulder or elbow. 1. Physiological factors: the right arm for a long time to maintain a certain posture pressure, or overuse can lead to the right arm pain and weakness, after resting for a period of time can be relieved, this is a physiological phenomenon. 2. Disease factors: such as frozen shoulder, cervical spondylosis, right shoulder or elbow trauma. (1) Frozen shoulder: it is a sterile inflammation of the shoulder, which can be caused by infection, injury and other factors, such as limited movement of the right shoulder, pain in the right arm and weakness of the right arm. (2) Cervical spondylosis: If you suffer from cervical spondylosis, you will experience symptoms such as radiating pain, numbness and weakness in your right arm, and pain in your right arm and lack of strength in your hand. (3) Trauma to the right shoulder or elbow: Trauma to the right shoulder or elbow can lead to bone, muscle, and nerve damage, resulting in symptoms such as right arm pain, weakness, and lack of strength in the hand. Excluding physiological factors, the occurrence of right arm pain and lack of strength in the hand need to consult a doctor in time to clarify the diagnosis and treatment.