Thoracic spine disorder refers to the disorder of the small joints of the thoracic spine, which is mainly manifested in the clinic as pain in the chest and back, activity limitation, fatigue and weakness, and hunchback. 1. Pain: If the small joints of the thoracic spine are disordered, the small joints will lose their normal anatomical position, and the patient may experience pain in the chest and back, especially in the back, and the pain may be aggravated during activities and coughing. 2. Restricted activities: Because the small joints of the thoracic spine can be misaligned, and there is severe pain during activities, so the patient dares not to move the thoracic back, so there will be restricted activities. 3. Fatigue and weakness: because of the pain and activity limitation, patients are prone to maintain a posture for a long time and cause excessive muscle tension, which may lead to fatigue and weakness. 4. Hunchback: Due to the pain in the chest and back, the patient will flex the body protectively, which may cause the symptom of hunchback for a long time. Patients with the above symptoms are advised to go to the hospital in time to get a clear diagnosis and then give targeted treatment.