|Ankle sprain is an injury in which the ligaments of the ankle get partially torn or fully torn away. In the ankle joint the function of the ligaments is to provide stability by limiting side-to-side movement so ankle sprain injury to this ligament occurs. Some ankle sprains can be much worse than the others. The severity of an ankle sprain will depend on the condition of the ligament, i.e., number of the ligaments involved, whether the ligament is stretched, partially torn, or completely torn. Ankle sprains are different from strains because the former affects the ligaments and the latter affects the muscles.
Ankle sprains is caused when the foot twists, rolls or turns beyond its normal motions. Due to this a great force gets transmitted to the ankle upon landing. So due to this the ligaments get stretched beyond their normal range in an abnormal position. Ankle sprains are commonly caused while participating in sports, walking or running on uneven or rough surface or wearing inappropriate shoes. It can be a birth defect also if the person is born with weak ankles. If there is any previous injury to the ankle or foot then it weakens the ankle and can easily cause sprain.