Injury Progression of Hamstring Pulls

A pulled hamstring is classified into 3 grades of hamstring strain severity:

Grade 1 (Minor) Hamstring Strains involve slightly pulled or excessively stretched muscles, or very small tears in your muscles. You will generally feel some specific point pain, tightness or mild cramping in your hamstring which will be a little uncomfortable, but will involve no swelling or no major loss of strength. These may diminish with activity, but will may return easily with further activity.

Grade 2 (Moderate) Hamstring Strains are more painful and involve a partial tearing of the hamstring fibers in your muscles, tendons, or at the tendon attachment to your bone. You will generally experience some pain that radiates down your leg during activity, while bending your knee against resistance, or when you touch your hamstring. Swelling, stiffness, decreased strength and range of motion (may not be able to straighten knee) will be apparent and can also cause you to limp. You may also experience some bruising (ecchymosis) due to bleeding within the injured muscle.

Grade 3 (Severe) Hamstring Strains involve a complete tear (rupture) of your hamstring muscle fibers where your muscle belly attaches to your tendon or where your muscle belly rips in 2 separate pieces. It is very painful and rarer than the other strains. You will tend to experience a burning or stabbing pain, a lot of swelling and minimal strength, which may prevent you from walking without assistance or make it difficult for you to move your leg. Discoloration and widespread bruising in the injured area as a result of bleeding in the muscle tissue can also happen. You may also notice a break in your normal muscle outline that makes a gap under your skin where the muscle has come apart. This can be seen or felt with your hands and looks like a knotting of the muscle that produces a bulge.

The majority of hamstring strains are grade 1 or 2 strains that involve partial muscle or tendon tears that occur near the musculotendinous junction, where your hamstring tendon and muscle meet.

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Should You Seek Medical Attention for a Hamstring Pull?

This is up to your discretion; however any continued discomfort in your hamstring should be investigated. If you continue to experience the hamstring injury symptoms and have tried the suggested conservative treatments for 2-3 weeks, it is recommended that you seek professional medical attention. It is recommended you seek immediate attention if you:

• hear a "loud pop" in your muscle when injured
• have immediate severe pain, swelling or discoloration in your hamstrings
• experience severe weakness in your leg (compared to other leg) and have difficulty walking
• have a temperature over 100.4° F (38° C)
• notice blue toe nails, numbness or coldness below your injury

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To learn how to treat a hamstring pull, go here to our treatments page.

Product Advisors are available 9:00 am to 5:00 pm Eastern Standard Time Monday to Friday.

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AidYourHamstring advisors do not work on commission, so be assured you will only receive fair and objective information.

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During your recovery, you will probably have to modify and/or eliminate any activities that cause pain or discomfort at the location of your soft tissue injury until the pain and inflammation settle. The more diligent you are with your treatment and rehabilitation, the faster you will see successful results!

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