Pain symptoms in the back of the right back shoulder are commonly caused by cholecystitis and back muscle strain, as follows: 1. Cholecystitis: liver and gallbladder diseases can cause local inflammation, and the patient will show involved pain symptoms in the right shoulder and back, accompanied by local muscle tension and spasm, the pain is usually not intense and intermittent episodes, active treatment of the primary lesion will make the symptoms disappear completely. 2. Back muscle strain: shoulder and back Muscle strain is mainly caused by overwork, long time posture, can lead to pain, tension, and local muscle stiffness, through massage, hot compresses and other physical therapy, can gradually relieve the pain symptoms. In normal life, attention should be paid to protecting the liver and gallbladder as well as the shoulder and back muscles to avoid inflammation and strain, thus preventing severe pain symptoms in the right back shoulder.