What causes milk crust (infantile eczema)?

Oct 21, 2022 Source: Cainiu Health
Disease description:

My baby is two months old now, and recently developed many small red bumps around the mouth. The doctor suspects it might be milk rash (baby eczema). What causes milk rash?

Doctor's answer (1)
Dr. Zhang Weiling
Milk rash may be caused by frequent friction of the skin due to milk overflow, or by exposure to sunlight or cold stimulation. Additionally, there is a certain genetic component involved; for instance, if the child's parents or family members have a history of hereditary allergic conditions. It is important to keep the affected skin area clean and dry. Seek medical treatment when necessary.