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.
Small Joint Effusion Knee Causes , Treatment And Prevention. Small Joint Effusion Knee Causes , Treatment And Prevention. The accumulation of fluid around the knee joint is a type of small joint effusion. Sometimes referred to as water on the knee, it can be caused by arthritis or another underlying condition, overuse or injury. Pain, swelling and stiffness are the symptoms of small joint effusion of the knee, but there are several things that you can do to alleviate them.