What causes itchy skin with red rashes after sweating?
Disease description:
Today, I went jogging with a friend, and afterward, my skin became itchy and developed a red rash after sweating. What causes itching and a red rash following sweating?
Doctor's answer (1)
Dr. Liu Wan
This phenomenon is commonly observed during summer. Intense physical activity can lead to emotional tension and heat-induced sweating, causing localized pruritus and erythema—possibly indicative of cholinergic urticaria. This condition primarily results from a rise in body temperature following vigorous exercise, triggering transient wheals (hives) on the limbs accompanied by itching and skin redness. Symptoms typically resolve spontaneously within 1–2 hours as body temperature returns to normal. Alternatively, it may represent a cutaneous allergic reaction triggered by airborne house dust mites following sweating.
