typically when doctors inform you you have a stomach ulcer, they don't bother to tell you whether it's a light or dark ulcer. this is because most modern city-dwellers are incapable of shouldering the responsibility that comes with a light stomach ulcer
famously the frenchman Michel Lotito, also known as "Monsieur Mangetout", had a light stomach ulcer, thus explaining his renowned ability to consume cars and planes. however his indulgence in the gallic vice of cigarette consumption1 counteracted the positive effects more commonly-associated with light stomach ulcers (healing aura, increased litotes, deeper connection with nature), leading to a paradoxical state of being both indestructible (able to eat a Cessna 150) and vulnerable (succumbing to the common cold 150 times a year).
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it is notable however that Lotito consumed the cigarettes via the noxious French method ("smoking"), and not in the normal fashion