Fatigue fracture, also known as marching fracture because it was first discovered during army training. It refers to the accumulation of bones due to mild injuries, such as long-term weight bearing, marching, excessive exercise, etc. The stress of the same action accumulates and causes a fracture called fatigue fracture. 1. Clinical manifestations: mainly occur in the tibia and fibula, ribs, toes and other parts. Clinical manifestations of the fracture site pain, especially walking activities aggravated by rest or sleep to reduce. Localized light pressure pain. 2. Imaging manifestations: according to the different parts of the stress, the fatigue fracture site and pattern are also different. It often occurs at the distal end of the second metatarsal, the fracture line is not clear, and the edge is accompanied by a little periosteal hyperplasia. 3. Clinical features: mostly seen in the 2 or 3 metatarsals or the lower 1/3 of the fibula, characterized by no displacement, but healing is very slow, with pain symptoms, which may affect the normal life. x-ray is sometimes not diagnostic, and magnetic resonance imaging (MRI) can find linear fracture of the bones, or fracture line, bone texture fracture phenomenon, to confirm the diagnosis. 4. Treatment: The prognosis is generally good with the use of manipulation, braking and plaster fixation with support, and with later rehabilitation and functional exercise. There is a clear difference between fatigue fracture and fracture caused by violence, trauma and car accident. Most of fatigue fracture can achieve good results through active conservative treatment, and seldom need surgical treatment. If the fatigue fracture conservative treatment fails or higher sports requirements, can also be taken by a professional doctor surgical incision reduction internal fixation treatment to promote fracture healing.