The overall structure of your knee and leg, such as foot rolling, out-turned knees, or limping can cause excessive friction, or rubbing, on the pes anserine bursa as your weight shifts onto the inner part of the knee. Knee & Leg Structure/BioMechanical Aberrations The excess stress can lead to irritation and inflammation of any of the soft tissue over time, including the pes anserine bursa. In addition, if you are overweight, the knee joints have to work harder to carry a greater load causing more stress on the tendons, ligaments, muscles, bones, and bursae in the knees. Uneven distribution of weight will put extra stress on some areas compared to others leading to abnormal wear and tear on the stressed areas. This can cause excess load on the knee joints or may cause your weight to be unevenly distributed. Lack of exercise or activity allows muscles to become weak and your knees begin to lack the proper muscle support. In fact, if you are experiencing one of them - you are more likely to contract the other as bursae are in close proximity to tendons. It is possible to have both bursitis and tendonitis as the same time in any joint in the body. Tendinitis is when the tendon gets overstressed and microtears in the tendon form, weakening the tendon and often causing significant pain and inflammation.
Overusing or over-stressing any area of the body will often damage tendon tissue which can cause tears both large or small. Tendons are tough cords of tissue that connect muscles to bones. When the joint is over overused or overstressed, the bursa may become damaged with small micro-tears on the surface or become squeezed by tissue which has become tight. Bursae are flattened fluid-filled sacs that function as cushions between your bones and the muscles (deep bursae) or bones and tendons (superficial bursae). What is the difference Bursitis and Tendonitis?Įach joint in the body has one or more bursae (bursae is the plural form of bursa). If pes anserine bursitis was incurred due to the nature of your work, you will have very little chance of getting rid of this condition unless you change or stop the work that caused it until it is completely healed. Once this happens, the bursa sac walls may thicken and form scar tissue or calcium may collect in the bursa. Once a bursa is injured, fluid and/or blood is allowed to enter into the bursa and inflammation will increase over time. When the pes anserine bursa becomes inflamed, moving your knee becomes very painful and more difficult as severity increases. The excess friction can happen all at once (acute), or over a long period of time - typically due to repetitive movements (RSI). If there is too much pressure or friction on a bursa, excess fluid can build up in the sac and/or the the lining of the sac can thicken, causing inflammation. Bursae play an important role in leading a healthy, active life as they allow your joints to move smoothly and painlessly. These fluid-filled sacs are located in areas where 2 surfaces in your body, most often where a bone and tendon or a bone and muscle, rub together during movement. A bursa is a sac of synovial fluid, rich in protein and collagen. Pes anserine bursitis occurs when the pes anserine bursa sac inside the knee becomes irritated and inflamed. The pes anserine bursa lies beneath these tendons close to the shinbone, providing cushioning between the tendons and the tibia. These three muscles are the dominant knee flexors that function to allow movement of the leg towards the body and control rotation of the tibia, protecting the knee against stress when it is turned. The three tendons merge together on the inside surface of the shinbone.
The pes anserinus is the area where the tendons of 3 hamstring muscles (sartorius, gracilis, and semitendinosus) come together.
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