Pulled Hamstring (cont.)
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What Are Symptoms and Signs of a Pulled Hamstring (Hamstring Injury)?
The symptoms of a pulled hamstring depend upon the severity of the injury. Strains are described by how much damage occurs to the muscle and tendon fibers.
Muscles strains may occur over time as a result of overuse injury, or they may occur acutely with an abrupt specific injury. Moreover, there can be worsening of the severity of a hamstring pull if strenuous activity is attempted before the muscle has fully healed.
Muscle or tendon strains cause inflammation surrounding the injury site and symptoms include tenderness, pain, and swelling. Muscle spasm may also occur. Since muscles have excellent blood supply, a hamstring injury may cause bruising at the site of injury. After the injury, blood can ooze downward, pulled by gravity by gravity, so that bruising may be noted in the back of the knee or in the calf.
Medically Reviewed by a Doctor on 12/11/2015
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