If the milk allergy is mild and the symptoms are not severe, it is not necessary to treat it. If allergic reactions such as itching and rash occur, you can take anti-allergy medications such as oral loratadine and cetirizine for treatment and apply topical glycolic lotion to the affected area. After treatment, most of them can be relieved. In case of severe allergic reactions, such as dizziness, chest tightness and difficulty in breathing, it is necessary to go to the hospital in time because the degree of allergic reactions varies from person to person and can be life-threatening in severe cases. Infants with milk protein allergy can develop eczema, gastrointestinal symptoms including abdominal pain, diarrhea, nausea, vomiting and even blood in the stool. Allergen testing should be performed promptly, milk feeding should be stopped, deeply hydrolyzed or amino acid formula should be chosen for feeding, and other complementary foods should be added promptly to supplement nutrition.