Mental disorder in which an individual is excessively preoccupied with his own health and inclined to treat insignificant physical signs or symptoms as evidence of a serious disease. The hypochondriac may become convinced that he is ill even though he has no symptoms at all, or may exaggerate the importance of minor aches and pains, becoming obsessed with the fear of a life-threatening illness. A doctor's reassurances often have only a slight or temporary effect on the hypochondriac's anxieties. Hypochondriasis usually first manifests itself in early adulthood and is equally common among males and females. In some cases it may represent a psychological coping mechanism that the individual resorts to in order to deal with stressful life situations.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on hypochondriasis, visit Britannica.com.

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