Safety measures urged as catkins cause problems

Residents in Beijing are advised to go outside only in the early mornings or evenings if possible to avoid potential allergic reactions as the city enters its peak catkin season, experts said.

The white fluff floating in the air like snow is causing problems for many, as it tends to trap allergens such as pollen and dust. Symptoms reported include allergic conjunctivitis, itchy skin, rhinitis and even asthma. More residents than usual have been seen wearing face masks and goggles on city streets.

The catkin season lasts about 50 days citywide, from early April to late May. Without significant precipitation, temperature drops or strong winds, the fluff generally affects areas for around 20 days, with peak periods lasting about a week, according to a 2025 forecast released by the Beijing Meteorological Service and the Beijing Municipal Forestry and Parks Bureau.