This type of injury is usually caused by an incident like twisting your ankle. The injury is a stretched or torn ligament that can be either minor or actually quite serious depending on the severity of the damage and symptoms. Usually, though, a sprain isn't such a big deal, so urgent care can handle most cases. A sprain can take some time to heal (up to six weeks), but if it's treated right away and by a proper professional, this time can be lessened. The doctors here at Immediate Care of Oklahoma can handle sprained ankles, sprained thumbs, sprained wrists, and sprained knees, which tend to be most common, but can also handle other simple sprains.