What is a common sign of a broken rib?

A common sign of a broken rib is indeed pain during palpation and difficulty breathing. When a rib is fractured, the bone can cause significant pain, particularly when pressure is applied to the area. This pain may increase with movement, deep breathing, or coughing, resulting in the patient exhibiting shallow breathing to minimize discomfort. Difficulty breathing arises because the pain may deter the patient from taking deep breaths, which can lead to inadequate ventilation and potential respiratory complications.

The other signs mentioned in the incorrect choices may indicate other conditions. Swelling around the abdomen is not typically associated with broken ribs; it may suggest abdominal trauma. An increased heart rate could be a response to pain or stress but is not a definitive sign of a rib fracture. Bruising of the lower back may occur from other types of trauma and does not specifically relate to a rib injury, which generally affects the thoracic area. Hence, pain during palpation and difficulty breathing are the most direct indicators of a rib fracture.