It often begins in a way that seems harmless enough to ignore. A few red patches on the skin. Some itching that comes and goes. Mild discomfort that feels more annoying than alarming. Many people assume it is a temporary irritation—something caused by heat, food, detergent, or an insect bite—and go to sleep thinking it will disappear by morning. But in some cases, what looks like a simple rash is actually the first warning sign of something far more serious happening inside the body. When skin reactions are combined with breathing difficulties, the situation can escalate quickly into a medical...
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