Set car air conditioning to avoid sinus infections: The method is simple

Car air conditioning offers welcome relief during hot weather, but improper use can lead to uncomfortable health problems, including sinus infections and respiratory irritation. Experts advise that directing cold air directly onto the face can be detrimental, potentially weakening the body's natural defenses against bacteria and viruses.

According to medical science professor Janusz Skalski, a strong blast of cold air directly into the upper respiratory tract causes rapid constriction of blood vessels. This reduces blood flow and, consequently, the number of white blood cells available to fight off pathogens. Therefore, avoiding direct airflow to the face and excessively rapid cooling of the car's interior is key to staying healthy.

The recommended method for setting car air conditioning involves several steps. First, switch to manual control if the car has automatic climate control, allowing for precise adjustment of airflow direction and intensity. Next, direct the air solely towards the windshield. This strategy allows the cold air to bounce off the glass and disperse throughout the cabin, mixing with the warmer interior air.

Further steps include lowering the sun visors to help deflect and diffuse the cool air. Set the air conditioning to the lowest temperature initially, then regulate the cabin's perceived temperature by adjusting the fan speed. Once the interior reaches a comfortable level, reduce the fan speed to maintain it. For cars with less efficient systems, additional airflow directed towards the feet can help distribute cool air more effectively. Regular maintenance of the air conditioning system is also essential for optimal performance.

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An intense stream of cold air that hits the upper respiratory tract directly causes rapid constriction of blood vessels, limiting blood flow and thus reducing the number of white blood cells. As a result, the local defense reaction of the body, responsible for fighting bacteria and viruses, can be weakened. Therefore, it is worth avoiding directing the air conditioning flow directly at the face and cooling the car interior too quickly.