Spring is in full bloom and it is a good time to go out and enjoy flowers, but some people will have symptoms similar to “cold” after a trip, such as nasal congestion, nasal itching, sneezing, and even eye itching, conjunctival congestion and other discomforts that last more than 1 week, often mistaken for “cold”. “But the effect of taking cold medicine is very poor, then it is likely to have “allergic rhinitis”, also known as “allergic rhinitis”, is a type I allergic reaction. This requires a detailed examination at the hospital and appropriate medication. As an allergen, pollen can trigger an abnormal response of the immune system and cause the above symptoms. In Beijing, there are two peak periods for pollen dispersal each year: the first peak is in April, when tree pollen is present; the second peak is in August and September, when weed pollen is present. These two periods are the high incidence of allergic rhinitis in the Beijing area. It is important to pay attention to this season every year. Once the above symptoms appear and the “cold” persists for more than 2 weeks, you should promptly consult an ENT clinic to determine whether it is “allergic rhinitis”. Depending on the severity of the disease, oral anti-allergy drugs or nasal spray hormone or even surgery can be taken. Prompt treatment often leads to very good results. Since allergic rhinitis can lead to asthma, nasal polyps, sinusitis and other diseases, timely treatment can also effectively prevent the occurrence of these diseases.