What is a strain?
A strain is an injury to a muscle or to a tendon (tissue that connects muscle to bone). It is sometimes called a “pulled muscle.” A strain happens when a muscle or tendon is stretched too far or is partially torn. Symptoms of a strain are pain, swelling, and having a problem moving or using the injured area. The hamstring (thigh muscle), calf muscle, and Achilles tendon are commonly strained.
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What is a sprain?
A sprain is an injury to a ligament (tissue that connects bones to other bones). Joints contain many ligaments. A sprain results when a joint is twisted or pulled and the ligament stretches or tears. Symptoms of a sprain are pain, swelling, and having a problem moving or using the injured area. Ankles, knees, and wrists are the joints most commonly sprained.
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What is a contusion?
A contusion is commonly called a bruise. It is injury to tissue that causes bleeding without breaking the skin. It is often a result of being hit by a blunt object, such as a ball or bat. Symptoms of a contusion are discoloration of the skin, pain (which can be severe), and swelling. Contusions usually aren’t serious and usually don’t need medical attention. But a large, painful, or very swollen bruise, or a bruise that limits movement of a joint such as the knee, should be seen by a healthcare provider.
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