A foot or ankle sprain is a soft tissue injury. Most often, a sprain occurs when an injury pulls, stretches, or tears the ligaments that connect bone to bone. A fracture is actually a break in the bone. Many breaks and sprains occur during sports. Tripping or stumbling on uneven ground is another common cause of foot and ankle sprains and fractures. Symptoms of a sprained or broken foot or ankle include pain, swelling, bruising, and difficulty walking on the affected foot or ankle.