After the foot sprain, you can judge whether there is a fracture according to the following aspects: first, see, if there is a significant local deformity after the foot sprain, there should be a high suspicion of fracture. Second, touch, touch the injury after the foot sprain, you can touch the bone rubbing sensation, that is, the feeling of two bones rubbing against each other at the broken end, also highly suspicious of a fracture. Third, listen, after the foot sprain, put the stethoscope on the injury, if you can smell the bone rubbing sound, that is, the sound of two bones rubbing against each other, you can also determine the fracture. Fourth, the relevant imaging examinations, after the foot sprain should be early X-ray and CT examination, to determine whether there is a fracture and the type of fracture, according to the different types of fracture for the corresponding treatment.