While laughter won’t shrink your tumor or make your carotid artery stop gushing, it does increase your ability to tolerate pain. It’s not just because the laughter distracts you from the knife in your chest, the act of laughing releases endorphins, the body’s natural pain killers. You will physically feel less pain if you can make yourself laugh.
In a series of six tests, researchers studied a group of volunteers in both a natural setting and in the laboratory.
What the researchers found was that test subjects who watched the funny videos had a higher pain threshold compared to those who watched videos of the un-sidesplitting variety. Furthermore, as little as 15 minutes of laughter was enough to increase pain tolerance by a whopping 10 percent.