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M.D. Auyporn Chewataworn

When the Dust Settles

Auyporn Chewataworn

When the Dust Settles

It may feel as if a fog has rolled in, but as the day lengthens the fog stays. This is due to the difference between water vapor and dust particles.

The fog that we see in the capital and other big cities are smog (smoke fog) of dust particles.

Dust particles or debris is small solids that linger in the air, which occurs by nature or manmade and is considered air or water pollution.

Natural dust particles are from valcanoes, sand storm, forest fires, salt particles. Manmade dust particles are from exhaust pipes, electricity generators, industrial processes and include brush burning and forest control burn. In developing countries most of the dust debris occur from coal electricity generators.

A high level of dust particles in the air affect the lives of human, such as, respiratory tracts, heart diseases, liver diseases including lung cancer. The dust particles can be filtered by using masks.

Heavy particles will fall to earth due to gravity. While particles with small sizes than 10 micrometer (PM10) will stay in the air for many weeks and will be washed out by rain and other water based precipitation.

PM 2.5 is particles with diameter less than 2.5 times the size of human hair.


Those suffering from allergies to the respiratory tracts, both, children and adults will present different effects, such as, sneezing, runny nose, itchy nose, sratchy eyes, congested nose, shortness of breath, coughing, asthma and difficulties breathing.

Other stimulants include, talcum, perfume, strong spray, incense smoke, cigarette smoke, traffic pollutants, industrial pollutant and other smoke, which could cause undesirable side effects.

How to Avoid, Easier Said than Done

1. Remove yourself from poplluted areas.

In Case of Facing Pollution

1. If unavoidable, must protect oneself, wear masks, cover nose. Some may cover face with wet towel.

2. Clean the nose immediately after returing to clean place to reduce side effects.

If any side effects present, consult doctors.

Best regards,

Children Allergy Center

Samitivej Sriracha Hospital

(Article by Auyporn Chewataworn)

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