Allergens can be screened in 6-month-old babies, but the results should not be relied upon and should be identified on the basis of specific clinical signs. If allergies are frequent in 6-month-old babies, they can go to the hospital for allergen screening to look for specific allergens. In daily life, we should pay attention to observation and try to avoid contact with pollen and willow flakes. In addition, 6-month-old babies have gradually added complementary foods, it is important to pay attention to the non-allergy-friendly foods in small quantities to start adding, and pay attention to closely observe whether there are allergies. It should be noted that babies are prone to allergies for many reasons, including immaturity of autoimmune factors and hereditary factors, etc. 6-month-old babies’ immune function is still immature, and what they are currently allergic to may get better when they grow up, so it is not recommended to rely entirely on the results of the allergen screening, and specifics should be consulted with a medical professional.