Both common injuries, sprains are the stretching and tearing of ligaments, while strains are the tearing of muscles or tendons. These types of injuries can occur during any physical, daily activity or sport. Strains and sprains have similar symptoms that include pain, swelling and limited ability to move the affected area. Injuries that can cause strains and sprains can also cause fractures. Therefore, it is important to consult a doctor if you suspect you have an injury of this kind.