On the one hand, allergy is related to genetic factors. If one parent has allergy, the offspring may inherit the allergy-prone body, and have a much higher chance of developing allergy-related diseases, such as atopic dermatitis, allergic rhinitis, or asthma, etc. On the other hand, it is related to diet, stress, lack of sleep, infections, and various chronic diseases, which lead to weakened resistance and insufficient immune function. On the other hand, it is related to diet, stress, lack of sleep, infections, and various chronic diseases that lead to weakened resistance, and immune deficiency. Clinically, some people because of late night, poor rest, fatigue, or colds will appear skin allergies, such as hives, eczema and allergic rhinitis, etc., so there are two kinds of factors of allergic body congenital and acquired. Normally in the daily diet should pay attention to balanced, if recently appeared allergic symptoms, to avoid eating animal protein food, to have a good habit of life, pay attention to exercise, enhance the resistance. If it is very obvious that you are allergic, you should carry medication for allergy treatment with you.