Psychosomatic disorder, now more commonly referred to as psychophysiologic illness, is an illness whose symptoms are caused by mental processes of the sufferer rather than immediate physiological causes. If a medical examination can find no physical or organic cause, or if an illness appears to result from emotional conditions such as anger, anxiety, depression or guilt, then it might be classified as psychosomatic.
Reference:http://en.wikipedia.org/wiki/Psychosomatic_illness