By Pat Anson, PNN Editor

Are you selfless? Do you show concern for other people and take an interest in their well-being?

If the answer is yes, then your brain may be hardwired to feel less pain than people who tend to act more selfishly.

That’s the conclusion of a novel study conducted at China’s Peking University, where researchers performed MRI brain scans on nearly 300 people to learn about the biological reasons for altruistic behavior. They wanted to know why “performers” act selflessly in a crisis – such as food shortages or a natural disaster – even when there may not be a direct or indirect benefit from helping others.  

Their findings, published in the journal Proceedings of the National Academy of Sciences, showed that selfless behavior reduced activity in regions of the brain that process pain signals.  

“Our research has revealed that in adverse situations, such as those that are physically threatening, acting altruistically can relieve unpleasant feelings, such as physical pain, in human performers of altruistic acts from both the behavioral and neural perspectives,” wrote lead author Yilu Wang. “Acting altruistically relieved not only acutely induced physical pain among healthy adults but also chronic pain among cancer patients.”

Altruistic behavior has long been cherished in human society because it enables group members to collectively survive earthquakes, famines, floods and other crises. However, behaving selflessly also puts people at risk because it means giving away food, shelter and other resources.  

The MRI findings shed light on this paradox – and the psychological and biological mechanisms behind selfless behavior. 

“Engaging in altruistic behaviors is costly, but it contributes to the health and well-being of the performer of such behaviors,” Wang said. “Our findings suggest that incurring personal costs to help others may buffer the performers from unpleasant conditions.

“Whereas most of the previous theories and research have emphasized the long-term and indirect benefits for altruistic individuals, the present research demonstrated that participants under conditions of pain benefited from altruistic acts instantly.”

Heroic behavior isn’t necessary to reduce pain. Sometimes all it takes is a little empathy. 

According to a small 2017 study, just holding hands can reduce pain levels. Researchers found that when a woman was exposed to mild heat pain, her pain levels dropped when she held hands with a male partner. The more empathy the man showed, the more her pain subsided.