Ankle sprains are very common injuries -- some 25,000 people do it every day.​​​ Sometimes, it is an awkward moment when you lose your balance, but the pain quickly fades away and you go on your way. But the sprain could be more severe; your ankle might swell and it might hurt too much to stand on it. If it's a severe sprain, you might have felt a "pop" when the injury happened.