Published Mar 27, 2026 | 7:00 AM ⚊ Updated Mar 27, 2026 | 7:00 AM
Cold air may trigger bronchospasm in people with asthma, making breathing difficult.
Synopsis: Doctors warn that excessive exposure to air-conditioned air may dry the nose and throat, making the airways more vulnerable to irritation and infection. Poorly maintained ACs can also circulate dust, fungi and bacteria indoors.
On a scorching day, you might rush indoors and switch on the air conditioner for quick relief from the heat. The cool air feels refreshing almost at once.
Doctors say cooling systems are essential during extreme heat, but poor maintenance and overuse can irritate the airways and worsen allergies or asthma.
Dr P Praveen Kumar Reddy, Consultant in General Medicine at SRM Prime Hospital, Chennai, said prolonged exposure to air-conditioned air can affect the body’s natural defence in the nose and throat.
He told South First that air conditioners lower indoor humidity, which can dry the protective lining of the nose and throat. When this barrier dries out, dust, germs and viruses enter the body more easily.
“Sudden exposure to cold AC air can cause the airways to constrict, leading to wheezing, chest tightness and difficulty breathing,” he added.
Dr P Praveen Kumar Reddy also pointed out that poorly maintained cooling systems can worsen respiratory issues. “Dirty AC filters can become a breeding ground for fungi and bacteria, which then circulate in the air inside the room,” he said.
Similarly, Dr Nilesh Sonawane, Consultant Pulmonologist at Apollo Clinic in Pune, said prolonged AC use can create dry indoor air that irritates the throat and respiratory tract, leading to coughing or scratchiness.
“Cold air may trigger bronchospasm in people with asthma, making breathing difficult,” he told South First.
Dr Sonawane added that indoor allergens such as dust mites, pet dander and mould can circulate through cooling systems.
If fans are not cleaned regularly, dust from the blades spreads into the air and can trigger coughing, sneezing or breathing discomfort, especially in people with allergies or asthma.
Simple habits to protect your lungs this summer
(Edited by Dese Gowda)
