A
sprain is an injury to a
joint or its surrounding tissues caused by external forces
moving the joint beyond its normal limits or moving it in an unnatural direction. In order of frequency, the most common sites of a sprain are the ankle, knee, wrist, elbow, and spine. The abnormalities commonly seen in a sprain are torn ligaments, tendons, muscles, or synovial membranes in the vicinity of the joint and detached cartilage
inside the joint. In some
sprains inflammatory
fluid collects within the joint. These conditions cause pain, swelling, and restricted movement. Sprains are usually treated by bandaging the area to limit
movement while healing takes place. In some cases a syringe is used to withdraw fluid that has accumulated inside the joint.
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