Pain over the back may be due to frozen shoulder, cervical spondylosis, pleurisy and other diseases. 1. Frozen shoulder: Shoulder joints are overactive, often overloaded or traumatized, leading to inflammatory lesions in the muscles, tendons and other soft tissues of the back and frozen shoulder, and the patient may experience referred pain, resulting in pain over the back. 2. Cervical spondylosis: the cervical spine has been traumatized or the joints have degenerated because of ageing, or the posture is incorrect for a long time, which affects the normal physiological structure of the cervical spine, and cervical spondylosis occurs, and the pain in the upper part of the back occurs after the nerves and blood vessels are compressed. 3. Pleurisy: it is an inflammation that occurs in the pleural cavity, often with cough, chest pain, dyspnea as the main clinical manifestations. When the symptoms are severe, it will affect the surrounding nerves and tissues, resulting in involving pain over the back. Hidden pain over the back can also be seen in other diseases such as angina involving pain, lung disease, etc. It is recommended to go to the hospital in time to clarify the cause of the disease, under the guidance of the doctor for treatment.