The knee is a hinge joint that is responsible for weight-bearing and movement. It consists of bones, meniscus, ligaments, and tendons. The knee is fully designed to fulfill various functions, including the following…
- Provide stability.
- Helps lower and raise your body.
- Allow twisting of the leg.
- Make walking efficient.
- Supports the body in an upright position without the need for muscles to function.
Additionally, the knee is also one of the most complex joints in the human body. It connects the thigh (femur), to the shin bone (tibia), and also includes a smaller bone, the fibula, which is located next to the tibia, and finally, the kneecap (patella).
Our bodies are filled with small fluid-filled sacs called bursae that are located at certain friction points, such as joints or bony prominences. These bursa help cushion and protect the bone from friction as tendons and muscles cross over bone during movement, especially in places like elbows, knees, and hips.
Generally, bursitis is quite painful; this is due to the bursa sac becoming irritated and inflamed, affecting the bursa and the soft tissue around it. When pressure or friction is too high, excess fluid can build up in the bursa sac, and / or the lining of the sac can thicken, causing inflammation. When a bursa becomes inflamed, moving your knee becomes painful and difficult (this is known as bursitis). Any actions that put pressure on the inflamed bursa can increase irritation and cause further inflammation and pain.
Pes anserine bursitis is an irritation or inflammation of a bursa in your knee. The pes anserine bursa is located on the inner side of the knee just below the knee joint. Tendons of three muscles attach to the shine bone (tibia) over this bursa. These muscles act to bend the knee, bring the knees together, and cross the legs. Pes anserine bursitis is common in swimmers who do the breaststroke and is oftentimes called breaststroker’s knee.