Eczema caused by milk powder generally refers to what is commonly known as “tinea cruris”, which is an acute, subacute eczema that occurs on the head and face of infants and is generally referred to clinically as “infantile eczema”. This type of eczema usually occurs in infants 2 to 3 months of age, mainly involving the cheeks, forehead, between the eyebrows and head, and in severe cases, the trunk and extremities. The rash initially appears as symmetrically distributed erythema; as the disease progresses, papules, papules, and blisters gradually appear on top of the erythema; after the disease progresses, the blisters may break down due to scratching and rubbing, forming an exuding vesicle; after the exudation, vesicles, and blisters dry, a yellow adhesive crust forms. The course of the disease is always accompanied by significant itching. In addition, “formula-induced eczema” needs to be differentiated from the infantile manifestations of atopic dermatitis, also known as “atopic dermatitis” and “hereditary atopic dermatitis”, which is a condition associated with genetic allergies. Atopic dermatitis, also known as “atopic dermatitis”, is a chronic inflammatory skin disease associated with genetic allergies, with a tendency to exude similar to “infantile eczema”, but with a high incidence between 2 months and 1 year of age. The disease is prolonged and easily recurring, and generally resolves gradually within 2 years of age. It is difficult for families to distinguish it from “infantile eczema”. However, the basic treatment of “tinea cruris” is basically the same as that of “atopic dermatitis”, and breastfeeding can effectively block the allergic allergy caused by formula feeding, which can help to block the cause of the disease. It can help to prevent the occurrence of “infantile eczema” from the etiology.