A sprained ankle occurs following a sudden sideways or twisting movement of the foot. An ankle sprain can occur during athletic events, its common with basketball players after they land from a jump, or even just during everyday activities. All it takes is an awkward step, e.g. on the edge of a curb, or an uneven surface to cause an ankle sprain. An ankle sprain is the most common foot and ankle injury.
The immediate symptoms of a sprained ankle are pain in the area, mainly the ankle and sometimes down the foot, they may have trouble standing, walking or putting weight on the foot, swelling and bruising. The swelling can be immediate or occur over several hours.