An example of that might be when a person who is in a situation such as warfare, where he or she gets wounded. Many times the pain reported by the war veterans was either very mild to nonexistent, even though the injuries may have been devastating. The emotional state involved here iso ne of relief from being removed from danger. This is postulated as the reason why they have no pain. In the same circumstances, an individual, a victim of a robbery, may have a great deal of pain because of the stress involved and the circumstances that occurred.
Stress clearly can enhance the pain experience tremendously.
So, when one speaks of pain, one needs to speak of two responses. The nociception or the activation of the pain part of the nervous system and the emotional response to it at the same time. When discussing one without the other is not possible and clearly decreases the appreciation that one has when a person complains of pain. Pain experience is very complicated, it has many aspects and facets to it. These correspond to the nervous system from both the peripheral nervous system and its receptors to the modulated to the lower parts of the brain where the pain experience can also be modulated, but it also involves the more primitive responses that occur with pain as well as to the higher centers of the brain where emotional responses to chronic pain are present.