A reactive dog reacts in a way that mirrors your emotions. If you get upset, he gets upset. If you calm down, he calms down. Because of this, a reactive dog can sometimes be a frustration to live with, until you know how to handle him.
Swelling in the knee can be acute or chronic. Common Causes of Knee Pain or Knee Inflammation. Many of us refer to swollen knee as having âwaterâ on the knee. Medically speaking this is actually true. One of the major causes of a swollen knee is the accumulation of fluid within the knee joint of its surrounding tissue.
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.