My right leg is sore. i cant bend it fully at times and its painful to straighten it. i cant stand for long periods of hours it becomes hot in knee?

?knee: I assume the symptoms are emanating from the knee. Unless there has been a recent injury knee discomfort, aggravated by motion, may be from simple overuse, arthritis, tendonitis or more internal knee joint pathology such as cartilage or ligament damage. Try rest,cold alternating with hot applications and, if you can take it, Advil or Aleve for a week. If no improvement, see yoursELf or an orthoped