causes of fluid above the knee
Arthritis - The are several types of arthritis that may cause fluid on the knee. Infection or Inflammation - When areas of the knee are inflamed, this causes the knee to swell with fluid as the body combats the injury or bacteria in the area. A common form of inflammation that causes fluid in knees is bursitis.
Arthritis - The are several types of arthritis that may cause fluid on the knee. The most common types that cause excessive knee fluid are: 1  Osteoarthritis - the natural wear and tear of the cartilage around the knee due to aging.  Rheumatoid arthritis - a chronic inflammation of the joints due to an autoimmune disease.