A strain is a stretched or torn muscle or tendon that can be caused by a recent injury or a prolonged over-stressing of the muscle. Strains usually occur in the back or hamstring muscles.
A sprain is a stretched or torn ligament, which is the tissue that connects bone at a joint. Sprains are very common in wrists and ankles, but can also occur in feet, elbows, hands, and any ligament at a joint.
Treatment for strains and sprains are similar and will start with a suggested RICE therapy- rest, ice, compression, and elevation. To decrease pain and inflammation, your doctor will usually recommend this during the first 24-48 hours following an injury. From there you will need to improve the condition of the injury and restore function by working to regain strength and flexibility.