A sprained ankle is an injury that occurs when you roll, twist, or turn your ankle in an awkward way. This can stretch or tear the tough bands of tissue (ligaments) that help hold your ankle bones together. Ligaments help stabilize joints, preventing excessive movement. A sprained ankle occurs when the ligaments are forced beyond their normal range of motion. Most sprained ankles involve injuries to the ligaments on the outer side of the ankle. Causes of a sprained ankle might include:

• A fall that causes your ankle to twist
• Landing awkwardly on your foot after jumping or pivoting
• Walking or exercising on an uneven surface
• Another person stepping or landing on your foot during a sports activity