• Why does the knee swell?

The knee is made up of bones, cartilage and joints. The inner walls of the joints are covered by a tissue called synovium. Synovia is responsible for the production of synovial fluid, a natural cartilage lubricant. When it is inflamed, a process called synovitis, the production of synovial fluid increases and the knee swells.

  • What is “water on the knee”?

           Popularly, this swelling is known as “water on the knee”. It is known scientifically as joint effusion; which is precisely this excess of synovial fluid accumulated in the joints of the knees.

  • What are the causes?

Synovitis is usually caused by intra-articular lesions. High impact sports are the biggest cause; but it may also be secondary to other diseases, such as rheumatologic diseases.

  • What should I do?

Most importantly, consult an expert knee orthopedist to find out the cause of your swollen knees and institute treatment.