1, genetic factors. Infant eczema is a manifestation of atopic dermatitis in infancy. Atopic dermatitis is also called atopic dermatitis, atopic eczema, genetic allergic dermatitis, genetic allergic eczema, etc. This is related to genetic allergic constitution. Liu Shixin, Department of Pediatrics, Shenzhen Maternal and Child Health Hospital Parents who have allergic diseases such as asthma, urticaria, allergic rhinitis, etc., the affected child has immunological abnormalities. Children with eczema have plasma IgE levels several to dozens of times higher than normal infants, which is determined by genetics. Some babies may have other allergic diseases such as bronchial asthma or allergic rhinitis when or after eczema occurs, which is closely related to hereditary allergies. 2. Protein allergy. A high protein diet may be an external causative factor in triggering eczema in infants. In the eczema affected mothers, 92.7% of mothers used to pay close attention to nutrition during pregnancy, to chicken, duck, fish and shrimp and other high-protein diet, some like to eat spicy and other stimulating foods. In addition, there are also some breastfeeding mothers who focus on eggs, beef and mutton in order to strengthen their nutrition. The consumption of spicy and other irritating foods and seafood products by a breastfeeding mother may also aggravate the eczema of the affected child. Therefore, the mother in pregnancy or breastfeeding, if you find that the baby has allergies, you can consider whether the eczema is induced by allergies to protein. 3, environmental factors. (1) indoor temperature and humidity have a certain impact on the development of eczema in infants. Many mothers in order to avoid baby cold, rarely open the windows for ventilation, resulting in a more humid or overheated indoor; some live in too humid or dry places, can also cause eczema aggravated. The affected children may be aggravated by high indoor temperature in hot summer and other seasons, bathing with hot water, wearing too many clothes, and not paying attention to hygiene. (2) Some mothers dry or bake their babies’ diapers and other clothes at home, causing infant eczema to occur or worsen. (3) Some children are allergic to everyday household items, such as soap, laundry detergent, synthetic fiber clothes, Play-Doh, plastic toys, etc. (4) Climate change (sunlight, ultraviolet light, heat, dryness, cold, etc.), ecological damage, atmospheric pollution (excessive harmful gases or dust in the air) can also trigger or aggravate infant eczema. (5) The child inhaled dust mites, pollen, etc., contact with various animal and plant hair, feathers, etc., consumption of fish, shrimp, eggs and other food. (6) the application of certain drugs can also trigger or aggravate the disease. 4, psychological factors. Because of the fear of eczema recurrence or aggravation, mom and dad often worry that the baby may be allergic to certain substances, prone to seclusion, diet is excessively single, limiting its range of activities, etc., so that the affected child is prone to malnutrition or immune imbalance, the ability to adapt to the external environment is reduced, so that infant eczema becomes more stubborn and difficult to treat. 5, the difference between urban and rural areas. It is reported that the incidence of rural areas is lower than urban areas, which indicates that rural living and poor sanitation, the state of the mother’s diet does not have a significant impact on the baby, the temperature, humidity are lower than urban areas, to avoid the impact of induced eczema. Mom and dad adapt to this environment, due to genetics and other factors related to the baby also adapt to this environment. 6, improper medication and care. The actual fact is that you can find a lot of people who are not able to get a good deal on this kind of things. Some parents use hormonal creams, which work fast and are applied for a long period of time, often resulting in drug dependence or aggravation of the condition. The baby’s skin lesions are vesicant and exuding, and some parents scrub the lesions with irritating Chinese medicine; the lesions are dry, and the parents over-clean the lesions or scald them with hot water, or wash them with salt water, causing the symptoms to worsen. Some children have severe itching, affecting their sleep, and some have secondary infections, but parents still insist on not giving their children internal medication, causing symptoms to worsen. 7, other. In addition drugs, bacterial infections, viral infections, etc. can also lead to the occurrence of this disease. Excessive scratching, secondary infections, hot and cold stimulation as well as affecting perspiration can easily aggravate infant eczema.