Rib fracture after a few days but more pain may be the bone end displacement, cough, improper care and other reasons. 1. Displaced bone ends: If the patient is suffering from muscle and joint pulling force, it may lead to changes in the position of the broken ends, and the bone ends will be displaced, which will cause the bone ends to rub against each other, thus resulting in aggravation of pain. 2. Coughing: If the patient is suffering from lung or bronchial diseases, it may lead to coughing, and coughing may cause thoracic movement, which may lead to increased pain at the fracture site. 3. Improper care: Patients who are not properly cared for, or who do heavy activities, may also affect the recovery, leading to increased pain. If the symptoms are more serious, the patient should go to the hospital for chest CT and other examinations in time to clarify the diagnosis and early treatment.