Allergic rhinitis, also known as allergic rhinitis, is an allergic disease of the mucous membranes of the nasal passages and can lead to a variety of complications. Symptoms of allergic rhinitis include itchy and watery eyes, watery nose, sneezing and nasal congestion. Allergic rhinitis is not a serious disease, but it is a chronic disease with high morbidity. Once the disease flares up, it will recur year after year, seriously affecting the quality of life and daily work. It is important to note that some patients with allergic rhinitis can gradually develop asthma.

According to research data, each plant can cumulatively produce hundreds of millions of pollen grains, with some areas producing more than 10 tons of pollen per square kilometer. In windy and dry weather, the concentration of pollen in the air is even higher. Pollen floating in the air, very easy to induce allergic symptoms in sensitive people. China's vast territory, the allergic pollen in various regions is not consistent, the northern region to the wild Artemisia pollen-based, but in the north and south of the Yangtze River are found in ragweed, should pay attention to.

Spring allergy common pollen species according to the different provinces and cities are listed as follows: Provincial and municipal name spring common allergenic pollen species Beijing cypress, poplar, birch, ash Tianjin ash, poplar, elm, pine Hebei cypress, poplar, pine, elm, Shandong, pine, poplar, birch, maple Taiyuan poplar, willow, pine, cypress, Inner Mongolia, poplar, elm, birch, pine, Harbin, poplar, elm, birch, pine, Changchun, pine, elm, poplar, willow, Shenyang, poplar, oak, willow, pine, Zhengzhou Pine, cypress, paulownia, poplar Suzhou Structure, belladonna, pine, willow Hefei Structure, belladonna, pine, poplar, ginkgo Shanghai Pine, belladonna, elm, mulberry Zhejiang Pine, maple-poplar, cypress, belladonna Nanchang Pine, cypress, walnut, willow Fuzhou Pine, mulberry, poplar Xi'an Belladonna, poplar, oak, cypress Chengdu Belladonna, structure, maple-poplar, willow shirt Kunming Pine, cypress, millet, poplar Wuhan Belladonna, structure, maple-poplar, oak Changsha Cypress, structure, belladonna Guangdong Pine, pine, eucalyptus,