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Hamstring Muscle Strain

Hamstring Muscle Strain Symptoms and Causes

A hamstring strain or pull is an injury to one or more of the muscles at the back of the thigh. As the muscle tears, you might feel a popping or snapping sensation along with sudden pain that may be severe. Visible bruising is possible if blood vessels are broken. Swelling is also one of the symptoms of a hamstring injury, which has a number of causes.