Somatic symptom and related disorders
Somatic symptom disorders are characterized by the presentation of somatic complaints (somatization), often, but not necessarily, in the absence of a medical explanation of these sensations. The level of concern is generally disproportionate in relation to the severity of the somatic illness. Behaviourally, somatic symptom disorder entails signals that call for help and attention from others. Evolutionary considerations of why people present with somatic symptoms in the absence of a medical cause suggest that this behaviour could reflect a strategy to manipulate others in order to evoke care. Signals that aim at eliciting care from others are more persuasive if the ‘real’ intention is hidden from conscious awareness. Thus, self-deception may be involved in the presentation of somatic symptoms. Within the spectrum of somatic symptom and related disorders, the degree of self-deception may vary from high, as in illness anxiety disorder, to relatively low, as in factitious disorder.