Severe pain immediately after injury
Swelling around the ankle
Bruising or discoloration
Inability to bear weight or walk
Deformity or abnormal shape of the ankle
Tenderness directly over the bone
Pain that worsens with movement
Limited range of motion
A popping or cracking sensation at the time of injury
Numbness or tingling in the foot
Coldness, pale color, or weak pulse in the foot
Pain that does not improve with rest, ice, and elevation
Symptoms that are worse than a typical sprain
X-ray confirmation by a medical professional