Hay fever is an allergic reaction to pollen, the substance that is released by plants such as cedars and Japanese cypresses, therefore causes a symptom of sneeze and running nose.
It is also called seasonal nasal allergy.
Statistics show that 38.8 percent of Japanese people suffer from hay fever.
Most of us suppose that the hay fever season is February to April, but the amount of pollen reaches a peak in May.
Hay fever is an allergic reaction to pollen, the substance that is released by plants such as cedars and Japanese cypresses, therefore causes a symptom of sneeze and running nose.
