The child’s allergy at night should pay attention to the following situations: First, the temperature sensitivity may be higher, the temperature at night when some children are sensitive to cold air, there will be allergy symptoms, I am afraid that only at night when the air conditioning to solve, but open air conditioning should also pay attention to indoor ventilation, keep the air fresh. Second, allergies at night should pay attention to indoor sanitation, whether there are allergic factors, such as more dust, hygiene is not good, easy to mites, mold and other allergies, can only improve the family’s hygiene, the sun out of the child’s contact quilts, clothes, pillows and so out of the sun to kill mites. Third, some children may have underlying chronic allergic diseases, such as allergic rhinitis, and are prone to allergic symptoms at night, so they should see an ENT clinic for allergen screening.