Rib fracture complications. Structurally, each rib is located above the intercostal arteries, veins, and nerves. Therefore, the most critical issue with rib fractures is that they can cause severe pain for the patient. Thus, the main complication of a rib fracture is pain. This pain persists 24 hours a day, especially when the patient takes deep breaths, coughs, or turns over while sleeping during the night, which can awaken them due to the severe pain. Additionally, because of this pain, the patient is unable to cough effectively. Therefore, a large amount of phlegm, especially in smokers, accumulates in the lungs, leading to complications such as lung infections and pneumonia. Besides pain, another complication of rib fractures is the potential puncture of intercostal arteries or veins, which can cause hemothorax. This condition can result in a significant accumulation of blood in the pleural cavity, and a severe hemothorax can be life-threatening, especially a progressing hemothorax. Therefore, for patients with fractures of three or more ribs, it is recommended, according to the 2017 US guidelines for the treatment of internal fractures and the 2018 consensus from Chinese experts on internal fracture treatment, to actively proceed with surgical interventions. Studies have found that active surgical intervention for fractures of more than three ribs can significantly reduce the patient's pain, shorten hospital stays, and improve quality of life. In summary, the main complications of rib fractures include pneumothorax, hemothorax, pain, and resultant lung infections and pneumonia. These complications are crucial in the treatment of rib fractures and need to be actively addressed.