Is It More Than Just a Cold? Understanding Your Symptoms in Extreme Heat

by Kang Min seon Posted : August 8, 2026, 11:24Updated : August 8, 2026, 11:24

As extreme heat and tropical nights continue, the use of air conditioning has increased, leading to a rise in reports of air conditioning sickness. The temperature can exceed 95 degrees Fahrenheit during the day, while indoor environments are often kept around 68 degrees, causing the body to struggle with rapid temperature changes.


Particularly around the end of August, when summer fatigue accumulates, experts advise distinguishing between simple tiredness and symptoms of air conditioning sickness, colds, and heat-related illnesses to better manage health.


Unlike colds caused by viral infections, air conditioning sickness arises from significant temperature differences between indoor and outdoor environments and prolonged exposure to cold air, disrupting the autonomic nervous system. Symptoms such as headaches, fatigue, body aches, digestive issues, muscle pain, runny nose, and sore throat may resemble those of a cold, but typically do not include fever or only mild fever.


In contrast, colds are caused by viral infections and are characterized by clear symptoms such as fever, cough, and sore throat, with the potential for person-to-person transmission. If symptoms persist or are accompanied by high fever, it may indicate a cold or another illness rather than air conditioning sickness.


Experts recommend maintaining a temperature difference of no more than 5 to 8 degrees Fahrenheit between indoor and outdoor environments to prevent air conditioning sickness. It is also helpful to avoid direct exposure to air conditioning vents and to use light outer clothing or a lap blanket to help regulate body temperature.


Regularly cleaning air conditioning filters is important, as bacteria can proliferate and worsen respiratory symptoms. If staying indoors for extended periods, it is advisable to ventilate every 1 to 2 hours and engage in light stretching to promote blood circulation.


Tropical nights, which disrupt sleep, are another significant threat to summer health. Insufficient sleep can weaken the immune system and lead to decreased concentration and increased fatigue.


To combat tropical nights, it is recommended to lower indoor temperatures with air conditioning about an hour before bedtime, maintaining a temperature of around 78 to 82 degrees Fahrenheit while sleeping, or using a timer function. When using a fan, it is better to utilize the oscillation feature rather than directing it straight at the body.


Before sleeping, it is advisable to avoid excessive alcohol and caffeine, and taking a lukewarm shower can help lower body temperature. However, caution is needed with ice-cold showers, as they can constrict blood vessels and hinder temperature regulation.


During the day, preventing heat-related illnesses is essential. Even if not feeling thirsty, it is important to drink water frequently, and outdoor activities should be minimized between 11 a.m. and 5 p.m. If symptoms such as dizziness, nausea, severe headaches, or altered consciousness occur, one should immediately move to a cool place, hydrate, and seek medical attention if necessary.


As the heat may persist even after late summer, experts emphasize that "air conditioning sickness, tropical nights, and heat-related illnesses can largely be prevented through lifestyle habits," urging individuals not to let their guard down just because the heat has slightly eased. Consistent practices of regular sleep, hydration, and proper air conditioning management are crucial for maintaining health.





* This article has been translated by AI.