WE ALL KNOW ABOUT THE TYPICAL WARNING SIGNS OF DISEASE. LUMPS IN THE BREAST COULD MEAN BREAST CANCER. A DARK SPOT ON YOUR SKIN MAY MEAN MELANOMA. THAT SPARE TIRE AROUND YOUR MID-SECTION COULD PUT YOU AT RISK FOR HEART DISEASE. BUT OTHER NOT-SO-OBVIOUS CHANGES IN THE BODY COULD ALSO BE SIGNALING SOMETHING MORE SERIOUS. AFTER TRAVELING THE WORLD WITH HIS WIFE, LES DUNCAN THOUGHT HE HAD A CLEAN BILL OF HEALTH. ("We traveled in Germany, traveled in Switzerland.") THEN, THE UNTHINKABLE HAPPENED. "I had an excruciating headache. I was more nauseous than I've ever been in my entire life." HIS DOCTOR AT THE TIME SAID NOTHING WAS WRONG. LES KNEW BETTER. "I think the biggest mistake people make is not listening to their body." SOME BODY SIGNS COULD BE SIGNALING A BIGGER ISSUE. WHAT DOES IT MEAN IF ALL OF A SUDDEN YOU GO GRAY? ("That I've seen something really scary?") IT COULD MEAN THYROID DISEASE OR A VITAMIN B-12 DEFICIENCY. (:03) ("Oh yeah?") (:01) WHAT ABOUT VARICOSE VEINS? ("Well, I think probably your arteries aren't clearing out.") VARICOSE VEINS PUT YOU AT A HIGHER RISK FOR A POTENTIALLY-FATAL BLOOD CLOT OR DEEP VEIN THROMBOSIS. WARNING SIGNS OF DIABETES: BLEEDING GUMS, TINGLING FEET OR A RASH. AFTER PUSHING HIS DOCTORS, LES FOUND OUT HE HAD A GENETIC CONDITION THAT PUTS HIM AT RISK FOR BRAIN HEMORRHAGING. "He was very proactive about things, and he became very knowledgeable about what he had." LISTENING TO HIS BODY MAY BE WHAT SAVED HIS LIFE. AFTER HIS FIRST EPISODE, HE NOTICED PUTTING PRESSURE ON ONE SIDE OF HIS HEAD MADE HIM FEEL BETTER. "When I began treatment, the doctors told me that lying on the right side of my head probably applied the pressure needed to stop the bleeding and probably save my life." A HERO TO HIMSELF, NOW HE CAN GET BACK TO MORE IMPORTANT THINGS LIKE PLANNING HIS NEXT TRIP. LES SAYS HE ALSO CRAVED FOODS LIKE SPINACH, BROCCOLI AND ASPARAGUS. HE FOUND OUT LATER THOSE ARE FOODS RICH IN VITAMIN K, WHICH PROMOTE CLOTTING.