A humerus fracture heals in 6-8 weeks on average, according to Dr. Matt Morgan. Fracture healing time is impacted by variables including blood supply to the bone, rest and the absence of infection.
The American Academy of Orthopaedic Surgeons states that a humerus fracture, most common in the proximal humerus or the upper arm bone, is typically caused by direct trauma to the bone. Most can be treated without surgery, assuming the fracture is not displaced. Symptoms include severe swelling, pain and limited shoulder movement. Surgery involves fixation of the fracture using plates, pins and screws and sometimes may require shoulder replacement. The AAOS also reports that smoking is a risk factor for prolonged healing rate and fracture non-union, or failure of the fracture to properly heal.