Bruising after a foot sprain is usually caused by a ruptured blood vessel injury, which includes both soft tissue vascular injury and bleeding from a local fracture break, so the patient will experience local bruising. When bruising is found, it usually indicates that the injury is relatively serious. X-rays and MRI of the ankle joint should be taken promptly to confirm whether there are fractures, dislocations, and ligament ruptures. If any of these injuries are present, they should be treated promptly, using conservative treatment or surgical treatment to recover, or in severe cases, surgery to restore the stability of the fracture end, as well as the continuity of the ligaments. Patients can recover from ankle sprains with aggressive treatment, and bruises will gradually be absorbed without affecting the function of the ankle joint as well as weight bearing. Patients should also undergo active rehabilitation early after the injury to prevent recurrence of symptoms.