Back pain after rib fracture is usually related to intercostal nerve irritation, soft tissue injury, muscle tightness and other factors. 1. Intercostal nerve irritation: when rib fracture occurs, the damaged end of the fracture may repeatedly irritate the intercostal nerve, which may cause radiating pain, and the symptoms may radiate to the back, shoulder blade, arm and so on. 2. Soft tissue injury: if the rib cartilage is fractured, the symptoms may involve the cartilage of the back if the surrounding soft tissue is injured, thus causing pain. 3. Muscle tightness: When a fracture occurs, the surrounding muscles will be tight, and there will be obvious pain when you move, and the symptoms may involve the back, which is also known as migratory pain. If you have back pain after a rib fracture, it is recommended to consult a doctor in time and analyze the cause under the professional guidance of the doctor and then carry out targeted treatment. At the same time, you should take rest and reduce the amount of activity within a short period of time, so as not to aggravate the pain by pulling the localization.