Eczema is an inflammatory skin disease caused by a variety of internal and external factors with a pronounced tendency to exude, accompanied by significant itching. The onset of the disease seriously affects the quality of life of the patient. Especially in infants and young children, who are unable to speak, crying and scratching, many parents are anxious. The Internet has become the main source of information and the first choice of parents after 80s and 90s to solve medical problems. There are even those who buy fabulous topical ointments from the internet, leading to the aggravation of eczema. The main internal factor is genetics. If the father, mother or grandfather, grandmother, grandma or grandpa have a history of eczema, then the chances of the child getting eczema are much higher than the average child’s; if the father, mother and family members suffer from allergic rhinitis or asthma, the chances of the child suffering from eczema will also be significantly higher. For children under three years old, food allergies are the most common cause of eczema. Among them, milk, fish, shellfish, peanuts and soy are the most common. The second external cause is microorganisms. When our skin barrier is damaged, microorganisms and microbial products such as bacteria, viruses, and fungi can form antigens and superantigens that aggravate the eczema condition.