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Title: Doctors Warn of Heatstroke: Hot Body Without Sweating Is a Dangerous Sign

Thailand, 28th Apr 2026 - Amid continuously rising temperatures caused by extreme heat and global heatwaves, a critical health risk that should not be overlooked is heatstroke. This condition is becoming increasingly common during hot weather, especially among high-risk groups such as the elderly, young children, outdoor workers, and individuals with underlying conditions like heart disease, diabetes, and hypertension.Heatstroke is not just general heat exhaustion—it is a medical emergency. It occurs when the body is unable to dissipate heat effectively, causing a rapid rise in body temperature that disrupts the function of vital organs, particularly the brain and heart. Without timely treatment, it can lead to severe complications or even death.Dr. Suresh Kumar Narula, a specialist in cardiology, critical care medicine, coronary artery disease, and diagnostic angiography at Praram 9 Hospital, explains:“Heatstroke occurs when the body temperature rises above 40–40.5°C, reaching a critical level. The brain’s temperature regulation system fails, and the body can no longer release heat through sweating. As a result, the patient’s skin becomes extremely hot but dry, with no sweat. Internal organs begin to suffer damage immediately.”A key warning sign of heatstroke is a body temperature above 40.5°C without sweating, despite intense heat. This indicates failure of the brain’s temperature control system. The brain is the most heat-sensitive organ—once the temperature exceeds this threshold, brain cells begin to shut down. Patients may experience confusion, seizures, or loss of consciousness. This triggers a domino effect, where damage rapidly spreads to the heart, liver, and kidneys, causing acute inflammation.In severe cases, this may lead to Disseminated Intravascular Coagu...

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