The fracture triad is defined as pain, deformity and abnormal activity. The vast majority of fractures occur with significant pain, sometimes very severe, only in the elderly or milder fractures and fatigue fractures, the pain is not very significant. Deformity refers to the change in the appearance of the limb after a fracture, such as neck of femur fracture, which causes shortening of the lower limb and external rotation deformity, and Creutzfeldt-Jakob fracture, which causes a forked or spiked deformity of the forearm. Abnormal activity is a characteristic sign of fracture, which can also be called bone friction sound or bone friction sensation. Abnormal activity at the fracture site can definitively diagnose the fracture, even in the absence of x-ray examination.