Infant allergy is a very common manifestation, but it is important to focus on whether it is serious, what causes it, and to pay enough attention to actively avoid it. Some infants’ allergies may be milk protein allergies, and severe eczema, etc. when they eat formula, then it is important to emphasize that breastfeeding is advocated first and foremost, and secondly, if there is not sufficient breast milk, and breastfeeding is not sufficient, partially hydrolyzed formula, or even fully hydrolyzed formula, can be added to circumvent the allergens. Some children’s allergies may be due to eating other allergy-prone things, such as tomatoes, mangoes, pineapples, seafood, etc., which also need to be fundamentally circumvented by not coming into contact with them. At the same time, parents should be vigilant, that is, the child is prone to allergies, add food or new contact with something when attention must be careful, appropriate delay or avoid. Retrospectively record the occurrence of allergies, so as to actively search for allergens. If an acute allergic reaction occurs, appropriate anti-allergic drugs such as cetirizine or loratadine can be applied. Topical application of appropriate anti-itch medication. In the case of a large area of allergy, when the child has a tendency to become seriously ill such as a poor mental reaction, it is important to consult a doctor, bearing in mind that in allergy can also be very serious.