IAAF track and field world championships: What TV channel, how to watch online livestream. South Korea's Noh Si-hwan lays on the track as Japan's Kazuhiro Maeda crosses the line after finishing the men's marathon at the World Athletics Championships at the Bird's Nest stadium in Beijing, Saturday, Aug. 22, 2015.
The most common symptom of RSD is a continuous, intense pain that gets worse rather than better. Reflex sympathetic dystrophy (RSD), also known as complex regional pain syndrome (CRPS I), is a chronic pain condition that is believed to be the result of problems in the central or peripheral nervous system.ervous System Home. Reflex sympathetic dystrophy (RSD), also known as complex regional pain syndrome (CRPS I), is a chronic pain condition that is believed to be the result of problems in the central or peripheral nervous system.
Find out about pain. Pain is a feeling triggered in the nervous system. Pain may be sharp or dull. It may come and go, or it may be constant. You may feel pain in one area of your body, such as your back, abdomen or chest or you may feel pain all over, such as when your muscles ache from the flu. Pain can be helpful in diagnosing a problem.