After breaking the foot ankle bulging a bag, need to observe the foot shape is not correct, as follows: 1, the foot shape is correct: if the foot shape is correct, the bulging bag that is hematoma, or tendon, ligament strain, resulting in hematoma oozing. When the foot is injured, the outer ankle is quickly pulled, back to the original position will be arching a large bag, which is mainly ligaments are pulled after the ligaments have not yet retracted, shrink back when still swollen. Secondly, after pulling, there is a lot of exudate in the tissue, and when pulling the capillary pulling broken, capillary venous tube will have blood outflow or oozing, the formation of part of the hematoma; 2, foot deformity: part of the foot after the fracture, may be subluxation of the joints in the outside, if the bulge package, the first to determine whether the foot can be returned to its original shape, if there are medical personnel on the scene, it is quick to the position of the support back to the symptomatic relief; 3, foot fracture : the fracture may have a displaced broken end, was wrapped in a bag, the patient’s foot can return to its original shape, but the pain is severe and can not walk, the hand gently touch the large bag, can feel the fracture end.