Eczema is not a skin disease per se, it is actually a manifestation of a systemic disease on the skin. For infants, eczema is mainly related to allergies, contact, inhalation and food can all cause allergies in children, and food allergies are more common in younger children. Eczema and allergies are not contradictory or parallel. Eczema is a manifestation of allergies on the skin, which means that most children with eczema, first of all, have allergies (for infants, mainly food allergies), and then eczema manifests on the skin. Of course, it does not necessarily mean that children with allergies will have eczema, eczema is not an acute disease, but a chronic disease. If a child suddenly has a rash, but some medication, some even no medication, and soon disappears, this is also related to allergies, but not eczema, but hives, is an acute manifestation of the skin after allergies. Eczema is mainly a rough, flaky skin, not a rash. Eczema is usually skin-colored, red when exposed to heat, and will return to its original color after the ambient temperature drops, so heat and humidity can aggravate eczema, which is why many children’s rashes will worsen after bathing or sweating. Whether it’s skin tone or redness, the skin is locally rough. In addition, the specific appearance of eczema is not quite the same as any other rash, it is variable, that is, polymorphic, and can look like anything. The cause of eczema is mainly related to allergies, food intake, inhalation or contact may cause allergies in children, which for small children, the most important thing is intolerance or allergy to the food intake, if the child is formula-fed, mainly allergic to milk protein, if breast-fed, the child may be intolerant to some things ingested by the mother, thus appearing allergic performance. Eczema is one of the manifestations when a child is allergic, and many children will have digestive symptoms such as diarrhea and blood in the stool. Most of the allergic manifestations start 1-2 months after birth, and if left untreated, eczema and other manifestations will gradually worsen as the child grows up. For children with eczema, attention should be paid to actively finding the cause and dealing with it promptly at a young age.