Common symptoms of<unk>  are: negative or distorted cognition, such as feelings of despair or hopelessness; inactivity and passivity, in some cases disability; increased<unk> , sometimes requiring clinical treatment; sleep disturbance and fatigue; disruption of social relationships; depression and anxiety. Acute conditions last less than six months while chronic<unk>  lasts six or more months. There is no neurological or physiological basis for the<unk> .<unk>  is reported as more distressing than it should be had there been a physical explanation.<unk>  behavior highlights the psychological aspect of<unk> . This can be demonstrated how moderate<unk>  symptoms become more<unk> ful when rewarded in the form of solicitous and attentive behavior of others, by monetary gain, or by the successful avoidance of distasteful activities. The same can be said about excessive worry. A minor physical symptom can be aggravated or become more harmful and threatening if the person suffering engages in a constant body and symptom appraisal, which can lead to stress and maladaptive behavior when coping with the physical symptom.
Pain disorder
Physical disorder
Cognitive disorder
Chronic pain
Cancer pain
Body image disturbance
Stroke recovery
Mental disorder