Kirschner pins are commonly used in orthopedics for internal fixation, mainly for fractures with little stress, such as short fractures or avulsion fractures, and can also be used in orthopedic surgery to temporarily fix the fracture block. As for how many days to bandage after the removal of the Kirschner needle depends on the site of the needle, if the hand is removed from the Kirschner needle to bandage 3-5 days, during this period do not eat spicy food to stimulate the wound, such as chili. If the body of the extremities to pull out the needle, because the trauma involved is relatively large, the site is relatively deep, so it takes 1-2 weeks of recovery time, during this period need to be bandaged to avoid wound inflammation and infection, for the extremities of the needle mouth after pulling out the need for regular local disinfection and change of medication, need to pay special attention to the needle mouth of the wound is not healed do not touch the water to prevent re-infection.