Whether a fracture of the fifth metacarpal is serious or not needs to be judged on the specifics of the fracture. If it is a general linear fracture without obvious displacement, then it is relatively not serious. It can be treated conservatively with plaster immobilization. Generally speaking, there is no significant impact on function after recovery. If the fracture of the fifth metacarpal has obvious displacement, especially the serious comminuted fracture, then it is still more serious. If the fracture is not treated properly, it may have an effect on the flexion and extension of the little finger. A fracture of the fifth metacarpal may lead to bone deformity and, if not treated in time, infection as well as osteomyelitis may occur. Then it is relatively serious. If there is a fifth metacarpal fracture, it is recommended to go to the hospital in time to understand the specifics of the condition, and follow the doctor’s instructions to standardize the treatment, so as not to delay the condition.