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Psychology of pain
The perception of pain results from the brain's processing of new sensory input with existing memories and emotions, in the same way that other perceptions are produced. Childhood experiences, cultural attitudes, heredity, and gender are factors that contribute to the development of each individual's perception of and response to different types of pain. Although some people may be able physiologically to withstand pain better than others, cultural factors rather than heredity usually account for this ability.
The point at which a stimulus begins to become painful is the pain perception threshold; most studies have found this point to be relatively similar among disparate groups of people. However, the pain tolerance threshold, the point at which pain becomes unbearable, varies significantly among these groups. A stoical, nonemotional response to an injury may be a sign of bravery in certain cultural or social groups, but this behaviour can also mask the severity of an injury to an examining physician.
Depression and anxiety can lower both types of pain thresholds; anger or excitement, however, can obscure or lessen pain temporarily. Feelings of emotional relief can also lessen a painful sensation. The context of pain and the meaning it has for the sufferer also determine how pain is perceived.
Pain associated with certain psychiatric conditions is believed to arise and be maintained by psychological forces alone. Somatoform disorders, psychosis, and depression may be accompanied by complaints of chronic pain. Although chronic pain often gives rise to depression, sometimes the order is reversed, and vague localized pain for which no physiological cause can be found actually masks depression.
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