When a bone fracture occurs in the back of the foot, there are mainly pain, swelling and unfavorable feeling of activity. First, there is obvious pain because after a bone fracture occurs, there will be obvious damage to small blood vessels and inflammatory edema will be formed locally, some swelling will stimulate the surrounding tissues and there will be obvious pain, especially when performing activities, which will lead to obvious strain on the broken end of the bone and the surrounding tissues, and there will be Significant painful sensation. Secondly, swelling is caused by the rupture of small blood vessels, which gradually increases the amount of blood leakage and inflammatory edema, resulting in significant local swelling. Third, unfavorable activity, because after the bone fracture, the surrounding tissues will also be damaged, inflammatory edema and aseptic inflammatory lesions are formed, when the activity is carried out, there will be obvious pain due to pulling stimulation, so there will be obvious unfavorable feeling of activity.