[For Seniors] How much do you know? Trivia Quiz & Fun Facts about Hay Fever

Around lunchtime (11:00–13:00)

Pollen starts to disperse in the morning and reaches its peak as daytime temperatures rise. It is said to be most abundant around midday, especially between 11:00 and 13:00. After that, levels temporarily subside in the afternoon, but they can increase again around sunset in the early evening. This is because temperature changes in the evening cause pollen in the upper air to descend and pollen that has settled on the ground to become airborne again.

Japanese cedar (sugi)

In Japan, cedar pollen is the most prevalent, and the number of people with hay fever is overwhelmingly high. Every spring, large amounts of cedar pollen are dispersed, and many people suffer from symptoms. Cedars have long existed in Japan, but since the 1950s they were planted in large numbers, increasing the amount of pollen in the air, which is considered the reason for the rise in hay fever cases.

polyester

Because polyester has a smooth surface, it tends to resist pollen adhesion. Conversely, fabrics and materials with fluffy or rough surfaces are more prone to collecting pollen, as the uneven texture makes it easier for pollen to get trapped. Therefore, when going out, it’s advisable to wear clothing made from materials with smooth surfaces.

ragweed

The first case of hay fever reported at an academic conference in Japan was in 1961, and it was caused by ragweed pollen. Later, cedar pollen allergies became more common, but it seems that ragweed came first.

There are more women.

According to recent surveys by Japan’s Ministry of Health, Labour and Welfare and others, the prevalence of hay fever tends to be slightly higher among women than men. It is also notable that among women, the proportion is higher in those in their 20s to 50s.

Hang the laundry outside

If you hang your laundry outside during peak pollen season, pollen will stick to your clothes. Bringing those clothes into the house will bring the pollen inside as well. During pollen season, avoid drying laundry outdoors and opt for indoor drying.

more than 60 types

In Japan, not only Japanese cedar and cypress but also many other plants—such as white birch, grasses, and ragweed—cause hay fever. It is said there are more than 60 such species. Because various types of pollen are in the air throughout the year, people with hay fever need to be especially careful.