A sprain is an injury to a ligament and is often caused by a wrench or twist. Sprains often affect the ankles, knees, or wrists. If the ligament is torn, surgical repair may be necessary. A strain is an injury to a muscle or tendon, and is often caused by overuse, force, or stretching. If a tear in the muscle occurs, surgical repair may be necessary.
Most fractures occur in the arms and legs.
Symptoms may include tenderness over the bone, swelling of the affected area, deformity of the limb, and increased pain upon movement. Stress fractures are weak spots or small cracks in the bone caused by continuous overuse. Stress fractures often occur in the foot after training for basketball, running, and other sports. There usually is no swelling, but pain and tenderness often increases during movement. Be sure to consult your physician if there is a prolonged, visible deformity of the affected area, or if severe pain prevents use of arm, leg, wrist, ankle, or knee.