Many areas in winter in Thailand face health issues like the emergence of PM 2.5. Recently, the air quality in many areas in Bangkok has exceeded the standard safety, which may trigger symptoms of chronic allergies or rhinitis in those who have these diseases.

Chronic nasal congestion has direct impact on people’s quality of life. It causes trouble concentrating on studying or working, affects everyday activities and disrupts sleeping. The subsequent lack of sleep can lead to fatigue during daytime.

Chronic nasal congestion affects the quality of patient’s lives. The problem can hinder people's concentration during study and work. Operating normal daily activities could be tiring and leads to lack of sleep that results in sleep deprivation throughout the day.

Observing your symptoms is an important thing to do during the COVID-19 outbreak, especially people who have traveled to risky places or lived with people who are at risk of having COVID-19. One of the warning signs of COVID-19 is the loss of smell. Even though