A new study confirms that patients who have Post Traumatic Stress Disorder (PTSD) may have a higher tolerance to heat and pain.

In an article on   WebMD, researcher  Elbert Geuze, PhD, of the Netherlands' Department of Military Psychiatry and  colleagues studied 24 male Dutch veterans, all  took part in U.N. peacekeeping missions in Lebanon, Cambodia, or Bosnia.

Only half of   the veterans had PTSD while others did not to compare results.

Participant were asked to rate how much pain they felt when their hands were briefly subjected to heat at high temperatures ranging from 104-118 degrees Fahrenheit. In addition, they got brain scans using functional magnetic resonance imaging (FMRI) during the test.

Those with PTSD had a higher tolerance for the heat, compared to those without PTSD, these were the results of the brain scans.

Their study appears in the Archives of General Psychiatry.