To determine whether the leg is swollen, first of all, the two legs for comparison, if one leg thick and the other thin, and then press the thick part of the leg, there is no finger can be pressed down, but lift the situation is relatively slow. If this happens, it means that the thick leg has swelling. If the two legs are as thick, but also to press, there is no press down, the skin lifted more slowly, usually pressed in front of the shin, but also in the inner calf, the edge of the bone, if found this situation indicates leg swelling. There are many causes of leg swelling, including systemic and local causes, which need to be detected through examination, not only through medical history and physical examination, but also through ultrasound and blood tests to diagnose the cause of swelling.