Milk protein allergy in children may take 2 to 3 months, others need 1 to 6 years old, and some may even be accompanied by lifelong. The details should also be analyzed according to the severity of the allergy, the actual situation of the child, and so on, and should not be generalized. If the degree of allergy is mild, the child may just be allergic to the proteins in breastmilk or milk powder, and most of the allergy can gradually improve after 2~3 months. There are also children with cow’s milk protein allergy who can accept cow’s milk when their symptoms disappear at about 1 year of age; some can tolerate cow’s milk when their symptoms disappear at about 3 years of age; and some can tolerate cow’s milk at about 6 years of age. There are also a very small number of children who are moderately allergic to cow’s milk proteins and may remain so for the rest of their lives. They will always need to avoid foods or beverages containing cow’s milk proteins or else the allergy may reappear. Children who are allergic to milk proteins should seek medical attention if they become unwell when exposed to foods or drinks containing dairy products.