If a patient has a secondary fracture at the fracture site, the following symptoms are often seen: 1. Severe pain. This pain is much more intense in nature than the usual persistent pain. 2. Local swelling. This swelling can progress very rapidly, sometimes even with visible bruising under the skin. 3. There are signs of limited movement. The restriction of movement is mainly due to the severe local pain, and the patient is afraid to move. 4. There is a feeling of local instability. This feeling is most common in the larger bones of the upper or lower extremities. If a secondary fracture of the humerus occurs, the patient’s entire upper extremity will basically lose support, producing a very unstable feeling of fear. 5. The symptom of bone rubbing sound or bone rubbing sensation may be produced. The so-called bone rubbing sound is the sound produced by the fracture parts rubbing against each other, while the bone rubbing sensation is the feeling that the patient feels when the fracture parts rub against each other.