The core tip: There are many factors that trigger the disease, so patients should not blindly treat, but go to a professional and regular hospital for diagnosis, find the cause, and treat the symptoms. … There are many factors that trigger the disease, so patients should not blindly treat, but go to a professional formal hospital in time to diagnose, find the cause of the disease, the right treatment. The actual fact is that you will be able to get a lot more than just a few of these. The common causes of allergic rhinitis are as follows: Genetics and body composition According to statistics, the incidence of allergies in both parents can be as high as 75%, while the incidence of allergies in only one parent can sometimes be as high as 50%, so genetics plays a very important role. Seasonal changes in climate There are many patients suffering from pollen allergy abroad, while in China it occurs more often in autumn and winter, which are seasonal allergies; there is also a kind of perennial allergy, in other words, this kind of allergy attacks 365 days a year, regardless of the season. Changes in the environment Pollen, dust, temperature and humidity, and special physical and chemical smells may trigger allergies. Foods with allergens such as eggs, milk, wine, chili peppers, cabbage, seafood, and even ice can cause allergies. Infections Sometimes a virus or bacteria may be responsible for an upper respiratory tract infection, stimulating tissue cells and producing an allergic reaction. Endocrine changes For example, some women have an allergic attack only after pregnancy, and when menstruation comes or stops, the allergy becomes stronger, which may be the result of endocrine changes.