Chest pain after falling on the ground may be caused by chest hemorrhage, rib fracture and other reasons, which need to be analyzed specifically. 1. Thoracic hemorrhage: when the patient falls and lands on his back, the body is subjected to external violence resulting in pleural tearing, which may cause thoracic hemorrhage, and the patient will experience chest pain, usually accompanied by shortness of breath, blanched and other symptoms of blood loss. 2. Rib fracture: If the patient falls on his back and his ribs are damaged by external violence, and there is rib fracture, the broken ends of the fracture will stimulate the intercostal nerves, which will lead to chest pain and aggravation of the symptoms with hard breathing. There may also be other reasons, it is recommended that patients seek medical attention in a timely manner, under the guidance of the doctor for a systematic examination to confirm the specific causes of pain, targeted treatment to avoid other adverse consequences.