Little may be known about hammer toe, but in fact this disease is more common in daily life and is also known as baseball finger. It is due to the rupture of the extensor tendons of the fingers, resulting in the inability to straighten the end segments of the fingers, and its shape resembles a hammer, hence the name. Since most of them have no obvious discomfort symptoms and have little impact on daily life, most patients do not care about this problem and do not pay attention to it. When they go to the hospital, it is often a long time after the injury, and the cause of its formation is mostly poking or pinching. After the injury, the patient should be seen within a week, and late treatment will affect the effect of treatment. The main treatment modalities are surgical treatment and splinting.