Patients with rib fractures need to be immobilized even if they are not experiencing pain. The absence of pain at this point in time is often due to the relatively mild nature of the injury or the patient’s ability to tolerate pain. However, in these patients, there is a significant loss of bone strength at the fracture end because of the objective presence of the rib fracture. If the patient is not immobilized at this time, further displacement of the fracture end and serious secondary injury may occur due to subsequent activities or adverse external stimuli. If the patient is not immobilized and braked as prescribed by the physician at this time, there may be a gradual onset of aseptic inflammation at the fracture end, which may lead to significant pain during the night of the injury. In summary, such patients must be immobilized as prescribed by the physician.