[Health Tip] Hazy Days Due to Fine Dust... Should You Ventilate? Does Drinking a Lot Boost Immunity?

Yellow Dust Photo by Yonhap News

Yellow dust originating from northwest China is trapped under the influence of a high-pressure system over South Korea, causing persistent hazy weather. As a result, more people are reaching for masks again, which they had distanced themselves from after indoor mask mandates were lifted. Rain that fell in Jeju and southern regions the previous day is expected to expand to the metropolitan area on the 15th, easing the yellow dust, but air quality is expected to worsen again from the night as dust flows in from abroad, including China.

We have summarized health management guidelines to keep in mind when fine dust and yellow dust, common unwelcome guests in spring, are heavy, with the help of the Korea Disease Control and Prevention Agency.

Q. On days with poor fine dust levels, is it better to keep windows closed? Should ventilation be done even when using an air purifier?

Even on days with high fine dust, if ventilation is completely avoided, pollutants such as carbon dioxide, formaldehyde, and radon accumulate, worsening indoor air quality. Even when fine dust levels are high or when using an air purifier, short periods of natural ventilation are necessary to reduce indoor pollutant concentrations.

Q. Are there specific diseases caused by fine dust? Is fine dust only harmful to respiratory patients?

Fine dust is inhaled into the lungs and affects the respiratory system. It generates reactive oxygen species and promotes inflammatory responses, potentially impacting various organs in the body. Especially for those with existing conditions, fine dust can worsen symptoms or lead to severe progression, so managing health regularly is important.

Q. Does prolonged exposure to fine dust build immunity? Should one only be cautious on days when fine dust is very bad?

Prolonged exposure to fine dust does not build immunity. Exposure time should be reduced to decrease the amount inhaled.

Q. Should I wear a mask even if it feels uncomfortable or difficult to breathe while wearing it?

To block fine dust effectively, a health mask must be worn properly, fitting tightly to the face. However, if breathing becomes difficult or chest pain occurs after wearing the mask, do not force yourself to keep it on and remove it. Especially for respiratory or cardiovascular patients, it is advisable to consult a doctor before wearing a mask.

Q. Is it okay to exercise as usual on days when fine dust is very bad?

During exercise, the amount of air inhaled naturally increases, leading to greater exposure to fine dust. On days with poor fine dust levels, avoid intense outdoor exercise and switch to light exercise indoors rather than outdoors.