Does air conditioning cause a cold or irritate the nose and throat?
A cold is a viral infection; cool air does not create the virus. Air-conditioned environments may cause dryness or irritation, while ventilation and maintenance affect indoor air quality. Symptoms after switching on an air conditioner do not automatically prove infection or allergy.
Details
Look at the symptom pattern
Improvement after leaving a room may suggest an environmental factor, but does not establish the cause. Colds can cause a runny nose, sneezing and sore throat; allergy and irritation may resemble them. Consider duration and other symptoms rather than room temperature alone.
Improve the indoor environment
Maintain filters and suitable ventilation, choose a comfortable temperature and avoid an uncomfortable airflow directed at the face. Cooling alone does not solve dampness or mould; the moisture source and system maintenance need attention.
When to seek advice
Persistent symptoms or repeated problems in the same building warrant advice, particularly with asthma. Breathlessness, chest pain or marked deterioration needs prompt assessment. Do not take antibiotics simply because you believe air conditioning caused a cold. The appropriate response depends on the actual cause.
Related reading: When does a cough need antibiotics, and when will they not help?.