Collagen is a natural protein component of the skin that acts like a scaffold and the main building block for cells, tissues and organs. About a third of the protein content in your body is made up of collagen, which is found in the bones, muscles, and tissues of the organs.
1 There can be the accumulation of fluid on the knee after an accident. 2  In most cases, the fluid is blood which can be through a fracture caused to the knee. 3  The swelling of the knee often takes place within some minutes of the injury occurring. 4  Gout and pseudo-gout can also cause fluid on the knee.
Treat the cause of your knee effusion or excess fluid. Your doctor can remove the excess fluid in the knee through an aspiration procedure. The procedure also will relieve the pressure on your joint caused by fluid build-up. After the aspiration procedure, your doctor may inject corticosteroid into your knee joint.